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Homologation, from race part to retail part

In plain words. Homologation is the rule that a model must exist in a set number of identical units on sale before it may race. It follows the IJSBA's number through its books from 2002 and sets the UIM's 50 and the IHRA's 300 beside it. The books disagree on when a lower Ski Division figure ended, and none gives a pre-2002 figure.

Homologation is the count that decides whether a machine may race at all. This chapter reads the rule that sets the count in every IJSBA book held here, from 2002 to the current per-class documents, sets the UIM and IHRA figures beside it, and follows the definitions of a replacement part and an aftermarket part that decide what a race part is allowed to be once it is sold.

Words on this page (3)
Eligible Watercraft
The IJSBA rulebook’s phrase, in section 4.1 Homologation, for the models homologated and listed as eligible for competition. The 2002 and 2010 books both print it, and the 2010 book also calls the list the Model Homologation listing.
Homologation
Official approval of a model of craft, or of a part, as eligible to race under a body's rules. The terms vary by body and year; the 2002 IJSBA book wanted at least 500 identical units on sale (200 for the Ski Division), the 2026 UIM book wants at least 50 built and a homologation certificate for its GP4, GP3 and GP2 championships and a UIM logbook for a GP1 prototype, and the current IJSBA books also homologate aftermarket hulls.
Special Production Homologation
IJSBA 2010 track allowing homologation down to 25 units for Special Production Stock and Modified/GP classes

What the three current books mean by the word

Confirmed

Three sanctioning bodies publish rule books this site reads, and each defines homologation by a production count. The IJSBA glossary, as this site's notes on that body read the current glossary document, calls it "The process of officially approving or allowing a component or watercraft to compete in IJSBA events," which is the sentence the 2002 book's glossary already printed word for word, and the 2010 and 2012 glossaries repeat it. The count sits elsewhere, in the homologation document, which the body record reads as 500 identically manufactured units available through normal distribution, with 500 of them within the United States for regional and national events, a 100-unit limited-production route beneath it, and a rule that only models from IJSBA manufacturer members are evaluated. The UIM book, in those notes' reading of its rule 500.02, asks less of the factory and more of the paperwork: for the production classes GP4, GP3 and GP2 the craft must be marketed and available, a minimum of 50 specimens manufactured, and a certificate of homologation issued by the official navigation services of the manufacturer's country or by an independent private expert; the GP1 classes admit prototypes under a UIM logbook valid four years. The IHRA book sets its bar in B.7, that manufacturers are required to produce a minimum of 300 identical units of a model, available for sale through an established distribution network that makes watercraft accessible to the global market, and it names no territory and publishes no model list. Side by side the three figures are 500, 50 and 300, and they are not the same test. IJSBA counts units in a country, IHRA counts units reaching a global market, UIM counts specimens and a certificate. A model that clears one bar can fail another, which is why this site's notes on each sanctioning body say the body's name is load-bearing on every legality claim. The same word, in three books read in one season, names three different thresholds.

Sources: IJSBA Homologation document, 2023; IJSBA rule book page; 2002 rule book; 2010 rule book; 2012 rule book; UIM 2026 Aquabike rule book; IHRA rule book V.20260603

The IJSBA figure, book by book

Contested

The 2002 book prints the threshold twice in part 4, once for IJSBA and affiliate events and once for regional and national events in the United States, and both times the figure is 500 identically manufactured units with 200 for the Ski Division, sold through the manufacturer's normal means of distribution. The next held text, the Hungarian translation of the 2006 book, prints 500 with no Ski exception and already carries a route for models built below 500, so on that translation the 200-unit Ski figure is gone by 2006. The 2010 book, the first English text after 2002, prints 500 flat in part 4 with the below-500 route beneath it, and the 2011 and 2012 books repeat that article unchanged, the 2014 and 2015 books altering only the restriction clause noted in the next section; the 2016 text behind the 2018 change list numbers it 4.1.2 and 4.1.2.a and prints the same words. Yet the competition-classes appendix of the 2010, 2011, 2012, 2014 and 2015 books still prints the 2002 sentence, 500 with 200 for the Ski Division, for regional and national events in the United States, so for five editions the same book carried both figures, and the 2016 text is the first held English text without it. Our Wayback capture index dates the change from captures not read here, 500 with 200 for Ski to 2006, 500 flat from 2007, the 100-unit route from 2008, which disagrees with the 2006 translation on both counts. Which is right cannot be settled from the texts held, and this chapter prints the disagreement rather than choosing. What every held English book agrees on is the shape of the rule: a count, a normal distribution channel, a separate United States count, formal IJSBA approval before a model is eligible, each listing under Eligible Watercraft treated as a separate model, and a model that meets the count after the book is printed announced by bulletin. The 2006 translation prints the count, the distribution channel, the low-volume route and the separate-model note, and none of the other items. The 2002 book adds that such bulletins may be faxed, mailed or printed in Jet Sports magazine; the 2010 book drops the magazine and keeps the fax.

2006 book in Hungarian translation says
Its homologation chapter, as translated, requires 500 identically produced units with no Ski Division exception and already carries the route for models below 500 at a 100-unit minimum.
Wayback capture index says
The index dates the threshold from the unread English captures as 500 units with 200 for the Ski Division to 2006, 500 flat from 2007, and the 100-unit route from 2008.

Sources: 2002 rule book; 2006 book in Hungarian translation; 2010 rule book; 2011 rule book; 2012 rule book; 2014 rule book; 2015 draft rule book; 2018 pending changes and 2016 book

The low-volume route, and the exception that is not there

Confirmed

Below the 500 count every held book from the 2006 translation onward prints a second route. In the 2010 book a manufacturer producing fewer than 500 of a model must build a minimum of 100 identically manufactured units, and if all 100 are sold or disposed of before July 1 it must build 50 more, identical to the first 100, available by September 2. It must declare in its application that production will be below 500, keep the IJSBA informed of the status, location or purchaser of each unit, allow the IJSBA on request to broker the sale of up to 25 percent of the units to competition members, accept restrictions in Stock classes, place 100 units in the United States for regional and national events, and transport an IJSBA official to inspect the assembly line. The 2011, 2012, 2014 and 2015 books and the 2016 text repeat the eight points, the 2014 book widening the restriction clause to any class, especially Stock, and the body record reads the current document's HOM.5.2.a as the same 100 and 50 with the same July 1 and September 2 dates. The 2010 book adds a third tier in its appendix, Special Production Homologation, under which a manufacturer may homologate fewer than 100 units, a minimum of 25 with 25 more if they sell out before July 1, eligible only for a controlled Special Production Stock Class and the Modified/GP classes, with the IJSBA able to broker up to seven units and the manufacturer reporting each unit within 15 days for 180 days or to the year's end. The 2011, 2012, 2014 and 2015 books carry that appendix unchanged. What no held book carries, checked on 2026-10-02 with the current IJSBA Homologation text included, is an exception for exact reproductions of a homologated model. Our research notes attribute one to a 2024 book. The nearest wording in the held set is a parts rule, not a model rule: the 2011 change list opens the upper deck in Open and GP to an aftermarket deck that is an exact replica of the original with no change in dimensions or scale, and the 2012, 2014 and 2015 books print that sentence in part 8. A model exception, if one exists, sits in a document not read here.

Sources: 2006 book in Hungarian translation; 2010 rule book; 2011 rule book; 2011 rule changes; 2012 rule book; 2014 rule book; 2015 draft rule book; 2018 pending changes and 2016 book; IJSBA rule book page

When a new model may be homologated

Confirmed

The held books state timing in one direction only. Point 3 of the 2002 homologation article says that to be eligible for the World Championships competition, new models must be homologated a minimum of 90 days prior to the first day of competition, and the 2010, 2011, 2012, 2014 and 2015 books and the 2016 text print the same sentence. Our notes on that body read the current Homologation document's HOM.5.2 as the same 90 days. That is a deadline before the event, not a bar after it. No held book says that a new model year cannot be homologated until after the World Finals, checked on 2026-10-02 with the current document's text included; our research notes' sentence to that effect is attributed to a 2024 book not read here, so it is held in this chapter's blocked list and not in its text. What the books do say about timing within a season is procedural. Only models that met the criteria at the date of publication are listed as Eligible Watercraft, and models that meet homologation afterwards are announced by official bulletins faxed or mailed to affiliate offices, announced at a sanctioned event, or, in the 2002 book only, printed in Jet Sports magazine, and it is the competitor's responsibility to obtain the information. Mid-year production changes to a homologated model must be approved by the IJSBA, with samples of the new components, the related service bulletins and the customer notification letters submitted first, and the changes made available to every affected customer at no cost, parts and labour included. That clause, printed in every held book from 2002 to 2016, is the mechanism by which a factory update reaches the Stock baseline: not by a date, but by approval of the parts and a free retrofit. The 2002 book also gives the IJSBA the right to refuse, withhold or withdraw the homologation of any component or watercraft for reasons deemed to be in the best interest of the sport, and no later held book removes it.

Sources: 2002 rule book; 2010 rule book; 2011 rule book; 2012 rule book; 2014 rule book; 2015 draft rule book; 2018 pending changes and 2016 book; IJSBA rule book page

Aftermarket hulls, from an envelope to a programme

Confirmed

The 2002 book allows an aftermarket hull in its Modified part without any count: the hull may be modified or aftermarket but cannot exceed the length or width of the original upper deck component of the bond flange, measured by plumb bob with bumpers removed. The count enters with the 2010 book, whose Open Class part says aftermarket hulls may be used on watercraft homologated in numbers of 500 or higher, in classes carrying Expert and Pro designations, with the top deck kept as the original OEM deck; the same book's Superstock addendum is Open rules minus that clause and the aftermarket cylinder clause. Item 2 of the 2011 change list opens the deck, so that in Open and GP the upper deck need not be OEM if it is an exact replica of the original with no change in dimensions or scale, and the 2011, 2012, 2014 and 2015 books print that wording in part 8. The 2016 text behind the 2018 change list is where hull homologation first appears in the held set. Its 8.3.2 keeps the 500-unit condition, adds that hulls must be approved and homologated by IJSBA, allows slight changes to angles and radiuses to be approved in the top deck homologation, and settles disputes over appearance by a silhouette test comparing the aftermarket upper deck to the OEM deck. The 2018 change list then turns approval into registration for the new Mod Lites class: by the end of 2018 hull manufacturers and hull owners must participate in the IJSBA Aftermarket Hull manufacturing and monitoring system, affixing IJSBA approved hull identification numbers and maintaining a chain of custody and history of the hull. This site's notes on the sanctioning body read a 2023 Aftermarket Hull Homologation document, linked from the current rule book page, as the programme's next statement: manufacturers register with IJSBA and identify each competition hull design, disclose materials and process, and receive a unique ID tag per hull held in a queryable database, with only homologated hulls allowed to compete; the record calls it a forward-looking announcement that targeted 2024, with no submission process, fee, class list or named manufacturer. The association's own posts show it running. Its bulletin of 10 June 2019 says no aftermarket hull was then approved by brand or model. From 4 to 7 September 2024 it announced applications to the programme, and on 30 September 2024 it announced five hulls homologated: Bullett Racing's V6, Kommander Industries' GP1, VK Composites' Hyperion, and Fast Powersports' GP1R and GP16, each of which its maker may advertise as IJSBA Race Legal for products consistent with the specifications given to the IJSBA. Its report of 1 October 2024 says seven entities applied, that two more lines awaited photographs and paperwork, and that a seventh was offered approval on conditions its producer would not accept. In the held books the aftermarket hull went from a dimensional envelope in 2002 to a 500-unit gate in 2010, a homologated part in the 2016 text and a numbered object in 2018, and the 2024 posts name the first approved hulls; the 2018 numbering step has no ratified text held here.

Sources: IJSBA Aftermarket Hull Homologation, 2023; IJSBA hull bulletin of 10 June 2019; IJSBA first hull applicant post 2024; IJSBA Pro Watercraft hull application; IJSBA Kommander hull application; IJSBA Hyperion hull application; IJSBA Bullett hull application; IJSBA Bullett V6 homologated; IJSBA Kommander GP1 homologated; IJSBA VK Composites Hyperion homologated; IJSBA Fast Powersports homologated; IJSBA report on remaining hull submissions; 2002 rule book; 2010 rule book; 2011 rule changes; 2011 rule book; 2012 rule book; 2014 rule book; 2015 draft rule book; 2018 pending changes and 2016 book; IJSBA rule book page

Why it matters to a parts catalogue

Confirmed

Two glossary entries decide what a race part may be once it is sold, and the held books show one of them tightening. The 2002 glossary defines a Replacement Part as a non-original equipment part used to replace an original equipment part, limited to providing only the function that its OEM counterpart provides, and defines an Aftermarket Part as one replacing or used in addition to the original part; the 2010 glossary states the aftermarket side plainly, that aftermarket parts are not limited to providing the same function as their original equipment counterparts, and lengthens the replacement one to dimensions, performance and function. The 2011 to 2015 books repeat both, and the current glossary, as this site's notes on the sanctioning body read it, keeps them. Against those definitions sits the closed list. The 2002 Stock part says the watercraft must remain strictly stock except where rules allow or require substitutions or modifications, and that changes not listed are not permitted. The glossary itself says only what each kind of part may provide, not in which classes either may be used; that is left to each class's own list. Homologation adds a second gate the catalogue cannot see from the part alone. The 2002 book allows original equipment parts to be updated to newer OEM parts of the same model as bolt-ons; the 2010 book prints the note that updating and backdating may only be done within the same model or an IJSBA recognised replacement model, that each listing is a separate model, and gives the example that a Superstock Kawasaki JS750SXi Pro may not back date to a 1995 JS750SXi cylinder because the two are listed as different models. The 2011 book keeps the note and the example, the 2012, 2014 and 2015 books keep the note alone, and the current document, in the body record's reading of HOM.5.8, prints both again. So a route to retail, stated from the books and not from commerce, runs in three steps: the model must be on the eligible list under a count, the part must be a replacement part or an aftermarket part a class names, and an OEM part may only move between years of the same listed model. A part that fits is not thereby legal, and a book that lists a model is not evidence that the part was ever made.

Sources: IJSBA Homologation document, 2023; 2002 rule book; 2010 rule book; 2011 rule book; 2012 rule book; 2014 rule book; 2015 draft rule book; IJSBA rule book page

Not covered, and why (5)

The homologation figure was 500 units through the 1990s.
The Master list marks the 1990s threshold as not established. The oldest held book is 2002, and it prints 500 units with 200 for the Ski Division; the capture index says nothing on ijsba.com predates 2000; so no held or indexed text can say when either figure began, and the 500 figure of the current documents cannot be read backwards.
The 500-unit threshold turned the 750SXi Pro's factory carburettor setup and the SuperJet's redesign into homologation events rather than model refreshes.
Our research notes' own sentence, marked there as resting on a threshold it could not establish for that era. The held books list those models as eligible watercraft and print the rule that mid-year production changes need approval; no held text ties any specific model change to the count.
New model-year machines generally cannot be homologated until the day after that season's World Finals.
Our research notes attribute this to a 2024 book. No held book prints it, checked on 2026-10-02, when the current IJSBA Homologation document, held as text, was read in full and found to print no bar after the World Finals. Every held English book from 2002 to 2016 prints the opposite direction of timing, that new models must be homologated at least 90 days before the World Championships to be eligible there, and the current document's HOM.5.2 point 3 prints the same sentence, that "new models must be homologated a minimum of 90 days prior to the first day of competition". The sentence no longer waits on a reading; if a 2024 book prints it, it is not the document the rule book page links.
A narrow exception covers exact reproductions of previously homologated units differing only in cosmetics.
Also attributed by our research notes to the 2024 book and absent from every held text. The only exact-replica sentence in the held set is the 2011 change list's deck rule, which lets an aftermarket upper deck stand in for the original when it is an exact replica with no change in dimensions or scale; that is a parts rule inside Open and GP, not a model exception.
IJSBA's aftermarket hull homologation programme is in force and names approved hulls.
The body record reads the 2023 hull document as a forward-looking policy that targeted 2024, with no submission process, fee, class list or named manufacturer, and its 2025 status unknown. The 2018 change list promised a hull identification and chain-of-custody system by the end of 2018. The 2023 Ski Modified class document requires IJSBA recognised hull identification numbers on aftermarket hulls and top decks and warns that previously approved hulls may cease to be legal if their producers fail the IJSBA's compliance obligations. The association's own posts answer part of the claim: its bulletin of 10 June 2019 says no aftermarket hull was then approved by brand or model, and its posts of 30 September 2024 name five hulls that completed the programme, Bullett Racing's V6, Kommander Industries' GP1, VK Composites' Hyperion and Fast Powersports' GP1R and GP16. What stays blocked is the present tense: the reference page of approved hulls those posts promise was not found, and nothing held after 1 October 2024 names an approved hull or shows the identification records, checked against the rulebooks and the association's posts held here on 2026-10-06.

What could not be read (5)

  • Not held as text: the 2003, 2004, 2005, 2007, 2008, 2009, 2013, 2017, 2019 and 2020 IJSBA books. The Wayback capture index lists captures of the 2003 to 2009 books (2007 and 2008 complete), the 2013 and 2015 parts, a 2016 part set, one 2017 part and the 2019 general parts, all cached locally and unread for this chapter; its dating of the threshold year by year comes from those unread captures and is treated here as a claim to check, not a finding.
  • The 2006 book is held only as a Hungarian affiliate's translation, used here for the shape of its homologation article and nothing more. The 2016 book is held only as the text behind the pending 2018 change list, and the 2015 text is a draft.
  • No book before 2002 is held anywhere, and the capture index records that nothing on ijsba.com predates 2000. Nothing here says what the threshold was in any year before 2002.
  • The current IJSBA Homologation document (this site's notes on the sanctioning body call it the 2023 Homologation document, HOM) and the 2023 Aftermarket Hull Homologation document are held as text since 2026-10-02 and cited directly; the figures were first read through those notes on 2026-09-07 and from the rule book page on 2026-09-28, and the text confirms them. The IJSBA's own posts of 30 September 2024 announce five hulls homologated under the Aftermarket Hull Homologation Process, and its report of 1 October 2024 says seven entities applied; the 2025 Ski Grand Prix class document still requires that approval at SKGP.2.2. The reference page of approved hulls those posts promise was not found, and no approval later than 1 October 2024 is held (checked against the rulebooks and the association's posts held here, 2026-10-06).
  • The UIM 500.02 and IHRA B.7 articles are read from this site's notes on each sanctioning body and, for IHRA, the extracted text held here; no UIM homologation certificate, logbook or IHRA model list was seen, and the IHRA book publishes none.

Documents cited in this chapter

  • IJSBA Homologation document, 2023 (ijsba.com): IJSBA Homologation (HOM.1 to HOM.5), the 2023 document on the current rule book page, International Jet Sports Boating Association, 2023-08; sanctioning body, high. Four pages, held as text from 2026-10-02 after the edition watch found it linked and unread; the homologation chapter had read its HOM.5 count, low-volume route and worked example through our notes on that body, and now cites the document itself. File created 2023-08-31; prints no year.
  • IJSBA rule book page (ijsba.com): IJSBA Competition Rule Book (the current per-class documents), International Jet Sports Boating Association; sanctioning body, high. The live page, read on the accessed date. It links no single book but per-class PDFs dated 2021 to 2025, twenty of them class documents, plus general, competition and appendix documents. The class and body records on this site were read from these PDFs on 2026-09-07; the chapter's figures for the current set come from those records and from the page itself, not from a re-reading of the PDFs.
  • 2002 rule book (web.archive.org): IJSBA 2002 Official Competition Rule Book, International Jet Sports Boating Association, 2002; sanctioning body, high. The complete 2002 book in 25 sections, the oldest full IJSBA rule book held here, served from a Norwegian club's document server and captured by the Wayback Machine. Four numbered technical parts (Stock, Limited, Superstock, Modified), three divisions, the 500 and 200 unit homologation figures, and the United States class list.
  • 2010 rule book (web.archive.org): IJSBA 2010 Official Competition Rule Book, International Jet Sports Boating Association, 2010; sanctioning body, high. The complete 2010 book, kept by the Czech affiliate after IJSBA removed it. Part 8 is headed Open Class with Superstock as an addendum; the Stock part carries the Lites and class naming addenda; part 4 prints the 500 unit figure without a Ski exception and the 100 unit route below it; the appendix adds Special Production homologation below 100 units.
  • 2012 rule book (web.archive.org): IJSBA 2012 Official Competition Rule Book, International Jet Sports Boating Association, 2012; sanctioning body, high. The complete 2012 book. Its Lites addendum redefines Runabout Lites as four-stroke naturally aspirated Stock runabouts under 2000cc, and its Ski sponson rule is dated to itself, as of 2012, for the four-sponson allowance on Lites-eligible Ski.
  • UIM 2026 Aquabike rule book (uim.sport): UIM Aquabike Rulebook 2026 (published 22 December 2025), Union Internationale Motonautique, 2025-12-22; sanctioning body, high. The single 189-page UIM book that covers every class in one season. Rule 500.02 is its homologation article (50 specimens for the production classes, a logbook for GP1 prototypes) and rule 312 its freestyle discipline (five judges, ten criteria, 300 points). Cited here as the body and class records on this site read it, taken from the PDF on 2026-09-08, not from a re-reading of the PDF; the 2005 and 2006 Hungarian translations of earlier UIM books held here were not read.
  • IHRA rule book V.20260603 (ihra.com): IHRA Pro Watercraft Racing Competition Rulebook, version V.20260603, International Hot Rod Association, Pro Watercraft Racing, 2026-06-03; sanctioning body, high. The 95-page book, sections A to EE, held here as extracted text and read from it for this chapter. B.7 is the homologation bar (300 identical units, an established distribution network reaching the global market); C.1.3 the freestyle overview; H.1 to H.7 the freestyle operations; I.10 and J.6 the freestyle exemptions; CC the freestyle technical rules, whose CC.1 prints the one open-list sentence in the document. The public address is the rules page, because the PDF is served from an expiring signed link; the version string is the date to cite.
  • 2006 book in Hungarian translation (web.archive.org): IJSBA 2006 rule book, Hungarian translation (MJSZ 2006 rule book part II), Magyar Jet-Ski Szovetseg, translating the International Jet Sports Boating Association, 2006; sanctioning body, medium. A national affiliate's translation of the whole 2006 book, not IJSBA's own wording, so graded medium and used only for its part headings and its class table, where the class names are printed in English. Two accented letters print as substitute characters in the extract. The English 2006 parts are in the Wayback capture index and were not read for this chapter.
  • 2011 rule book (web.archive.org): IJSBA 2011 Official Competition Rule Book, International Jet Sports Boating Association, 2011; sanctioning body, high. The complete 2011 book from the Czech affiliate's server. Repeats the 2010 Lites addendum (85 and 220 horsepower) and the class naming addendum, and its competition classes appendix still prints 500 (200 for Ski Division) while its part 4 prints 500 flat.
  • 2014 rule book (web.archive.org): IJSBA 2014 Official Competition Rule Book, International Jet Sports Boating Association, 2014; sanctioning body, high. The complete 2014 book. Runabout Lites is renamed Runabout Rec Lites in the addendum, and the class list adds Vintage Ski (JS type hulls only, 550cc maximum), Sport GP and Runabout 1000 Superstock.
  • 2015 draft rule book (web.archive.org): IJSBA 2015 Official Competition Rule Book (draft), International Jet Sports Boating Association, 2015; sanctioning body, high. A draft, as its file name says, so cited only where it repeats earlier books. Its class list is the 2014 list unchanged, Vintage Ski included.
  • 2018 pending changes and 2016 book (jetski.cz): Pending rule changes to the 2018 IJSBA Competition Program, with the 2016 Official Competition Rulebook text, International Jet Sports Boating Association, 2018; sanctioning body, high. The first 74 lines of the extract are IJSBA's posted list of pending changes to the 2018 competition program, written before the Board of Directors ratified them; the rest of the file is the text of the 2016 book (copyright 2016) with its 2016 Displacement Guide. Held live from the Czech jetski.cz server at pull time, not from the Wayback Machine. No signatory is copied from it.
  • Wayback capture index (web.archive.org): IJSBA documents recovered from the Wayback Machine (our capture index), BaddJet research, 2026-09-21; project research, low, held on file and not evidence. Our own table of Wayback captures of ijsba.com PDFs, with the capture URL of each, and its summary of the homologation threshold year by year from captures cached locally and not read for this chapter. Not evidence; a contested entry may point at it for the dating it records.
  • 2011 rule changes (web.archive.org): 2011 IJSBA Rule Book Changes, International Jet Sports Boating Association, 2011; sanctioning body, high. The itemised 2011 amendment log, motions as passed. Item 7 bars Novice licence holders from Open, Modified and GP classes where supercharged or turbocharged runabouts are allowed; items 1 and 2 open fuel tanks and replica top decks in Open and GP.
  • IJSBA Aftermarket Hull Homologation, 2023 (ijsba.com): IJSBA Aftermarket Hull Homologation, Hull and Sponson Guide, the 2023 document on the current rule book page, International Jet Sports Boating Association, 2023-08; sanctioning body, high. Two pages announcing the aftermarket hull homologation process, builder registration, hull ID tags in a database and sponson scrutiny, expected for the 2024 season; held as text from 2026-10-02. The homologation chapter's reading of it through the body record is confirmed against the text: registration, disclosure, an ID tag per hull, only homologated hulls competing, a 2024 target, no fee or class list.
  • IJSBA hull bulletin of 10 June 2019 (ijsba.com): IJSBA Bulliten On Present State And Potential Future Of Aftermarket Hulls (IJSBA news post, 10 June 2019), International Jet Sports Boating Association, 2019-06-10; sanctioning body, high. The association's own bulletin on aftermarket hulls, read live on 2026-10-06, with the post's spelling of bulletin kept in the title. It says no aftermarket hull was approved by brand or model as of 2019, that homologating hulls and issuing trackable identifications had been introduced within the last five years, and that new 2019 designs might be reevaluated if a hull monitoring system was designed. The Watercraft Journal printed the same text on 22 July 2019. The contact email is replaced in the held copy.
  • IJSBA first hull applicant post 2024 (ijsba.com): Fast Powersports Is First Applicant For IJSBA Aftermarket Hull Homologation (IJSBA news post, 4 September 2024), International Jet Sports Boating Association, 2024-09-04; sanctioning body, high. The association's announcement that Fast Powersports of Phoenix, Arizona, had submitted a complete packet for the GP1R, GP16 and F1. Read live on 2026-10-06, the page date being the visible date. The contact email is replaced.
  • IJSBA Pro Watercraft hull application (ijsba.com): Pro Watercraft Applies For IJSBA Aftermarket Hull Homologation (IJSBA news post, 5 September 2024), International Jet Sports Boating Association, 2024-09-05; sanctioning body, high. The association's announcement that Pro Watercraft had applied for its Pro Force 3 unit, the application pending. Read live on 2026-10-06; the contact email is replaced.
  • IJSBA Kommander hull application (ijsba.com): Kommander Industries Applies For Aftermarket Hull Homologation (IJSBA news post, 5 September 2024), International Jet Sports Boating Association, 2024-09-05; sanctioning body, high. The association's announcement that Kommander Industries, out of Phoenix, had applied for its GP1 hull and top deck combination. (as IJSBA Pro Watercraft hull application above)
  • IJSBA Hyperion hull application (ijsba.com): Hyperion Brand Ski Are Submitted For Aftermarket Hull Homologation (IJSBA news post, 6 September 2024), International Jet Sports Boating Association, 2024-09-06; sanctioning body, high. The association's announcement that V K Composites of Pathumthani, Thailand, had applied for its Hyperion units. (as IJSBA Pro Watercraft hull application above)
  • IJSBA Bullett hull application (ijsba.com): Bullett Racing Applies For IJSBA Aftermarket Hull Homologation (IJSBA news post, 7 September 2024), International Jet Sports Boating Association, 2024-09-07; sanctioning body, high. The association's announcement that Bullett Racing LLC, out of Lake Havasu City, Arizona, had submitted a complete application for its Bullett V6. Read live on 2026-10-06; it places the company in that city in the association's words.
  • IJSBA Bullett V6 homologated (ijsba.com): Bullett Racing Homologates V6 For Race Use (IJSBA news post, 30 September 2024), International Jet Sports Boating Association, 2024-09-30; sanctioning body, high. The association's announcement that Bullett Racing had completed its aftermarket hull homologation for the V6. Read live on 2026-10-06.
  • IJSBA Kommander GP1 homologated (ijsba.com): Kommander Industries Homologates GP1 Hull (IJSBA news post, 30 September 2024), International Jet Sports Boating Association, 2024-09-30; sanctioning body, high. The association's announcement that Kommander Industries had completed its aftermarket hull homologation for the GP1 and could advertise it as IJSBA Race Legal for products consistent with the specifications it had provided. Read live on 2026-10-06.
  • IJSBA VK Composites Hyperion homologated (ijsba.com): VK Composites Homologates Hyperion Hull For Competition (IJSBA news post, 30 September 2024), International Jet Sports Boating Association, 2024-09-30; sanctioning body, high. The association's announcement that VK Composites had completed its aftermarket hull homologation for the Hyperion. Its last sentence names Bullett Racing in error and gives another company's web address, which looks like a copied template. Read live on 2026-10-06.
  • IJSBA Fast Powersports homologated (ijsba.com): Fast Powersports (IJSBA news post, 30 September 2024), International Jet Sports Boating Association, 2024-09-30; sanctioning body, high. The association's announcement that Fast Powersports had completed its aftermarket hull homologation for the GP1R and GP16, not the F1 named in its application. Its last sentence names Bullett Racing in error, which looks like a copied template. Read live on 2026-10-06.
  • IJSBA report on remaining hull submissions (ijsba.com): IJSBA Report On Remaining Aftermarket Hull Submissions: Crazy House, 4 Star, and Pro Force (IJSBA news post, 1 October 2024), International Jet Sports Boating Association, 2024-10-01; sanctioning body, high. The association's report of 1 October 2024 on the three remaining applicants. It says seven entities applied and four were complete, gives the association's own account of the Pro Force application and of an amnesty to 31 December 2024 for owners of used units, and says the association banned all aftermarket hulls in 1997 and reintroduced them in the mid 2000s. High for what the association says; it is one side of a disagreement whose other side is held only as a newspaper lead. (as IJSBA Pro Watercraft hull application above)

Changes to this chapter

  • 2026-10-09: Corrected 2026-10-09: the definitions paragraph had said a part sold as a replacement is legal wherever an OEM part is required, and that a part changing performance is legal only in a class whose list names it. No IJSBA book read says either; the 2002 and 2014 glossaries define the two kinds of part and say nothing of where they are legal, so the sentence now says that.
  • 2026-10-06: Two hull programme sentences narrowed after a search of the held class documents. The gap had said nothing read says what became of the programme after 2024; the 2025 Ski Grand Prix document still requires approval through it at SKGP.2.2, so the gap now says so and keeps only the absence of any homologated hull. The blocked programme entry had said nothing held shows the 2018 identification system operating; the 2023 Ski Modified document requires IJSBA recognised hull identification numbers and speaks of previously approved hulls, so the entry now says that and keeps only the absence of a named hull or of the records.
  • 2026-10-06: Later the same day the hull programme was corrected against the IJSBA's own aftermarket hull posts of 4 September to 1 October 2024, now held. The chapter had said nothing showed any hull homologated under the programme; the posts of 30 September 2024 announce five, the Bullett V6, Kommander GP1, VK Composites Hyperion and Fast Powersports GP1R and GP16, and the report of 1 October 2024 says seven entities applied. The gap, the blocked programme entry and the hull section now say so, and the 10 June 2019 bulletin's statement that no hull was then approved is added.
  • 2026-10-02: The IJSBA Homologation document and the Aftermarket Hull Homologation guide, which this chapter had read through this site's notes on the sanctioning body, are held as text since the rulebook check of 2 October 2026 and are cited directly; the count, the low-volume route, the worked example and the hull programme read as the record had them.
  • 2026-10-02: Later the same day: the blocked timing claim had said its sentence waited on a reading of the current Homologation PDF. The document, held as text, was read in full on 2026-10-02; it prints the 90 days before the World Championships at HOM.5.2 point 3 and no bar after the World Finals, so the blocked entry now says so, and the exact-reproduction sentence carries the same check date.
  • 2026-09-30: Source check against the held books: the 2010 appendix also prints the 200-unit Ski figure, the 2014 and 2015 books alter the restriction clause, the 2006 translation carries fewer of the rule's items than the English books, the 2010 Superstock addendum also drops the aftermarket cylinder clause, and the replacement-part definition lengthened in 2010, not in the current glossary.
Cite this page

“Homologation, from race part to retail part”, BaddJet archive, https://baddjetarchive.com/racing/history/homologation/

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2002 to 2026 · 6 sections · 1 contested · 5 claims held back

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