# 道路運送車両法 / Road Transport Vehicle Act — 第九十九条の二 (Article 99-2) - Law: 道路運送車両法 (Road Transport Vehicle Act), 昭和二十六年法律第百八十五号 - English title "Road Transport Vehicle Act": Ministry of Justice translation database, which lists the title - Kind: Act — the distinction between 法律 (Act), 政令 (Cabinet Order), 省令 (Ministerial Order) and 条例 (local ordinance) decides who may issue it and what it may say. - Provision: 第九十九条の二 (Article 99-2)（不正改造等の禁止） — address `art-99-2` - Text in force since: 2026-04-01 - URL (the page that opens at this provision): https://japanlaw.org/en/road-transport-vehicle-act/art-99-2 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/326AC0000000185/art-99-2 - Every provision below carries its address and both URLs on the line under it. - Japanese text: e-Gov 法令検索, Digital Agency (デジタル庁). English: as marked on each line below. Only the Japanese as published by the government has legal effect; the text below is a copy of it. Every English rendering below is a translation and says which kind: the Ministry of Justice's translation, or this site's machine translation, whose model and date the Sources list names. They are never merged and never substituted for one another. --- ### 第九十九条の二（不正改造等の禁止） — Prohibition of Unauthorized Modification, etc. caption: machine translation, not official art-99-2 · https://japanlaw.org/en/road-transport-vehicle-act/art-99-2 · https://japanlaw.org/l/326AC0000000185/art-99-2 **第一項** 何人も、第五十八条第一項の規定により有効な自動車検査証の交付を受けている自動車又は第九十七条の三第一項の規定により使用の届出を行つている検査対象外軽自動車（以下「自動車検査証交付済自動車等」という。）について、自動車又はその部分の改造、装置の取付け又は取り外しその他これらに類する行為であつて、当該自動車が保安基準に適合しないこととなるものを行つてはならない。 art-99-2/par-1 · https://japanlaw.org/en/road-transport-vehicle-act/art-99-2/par-1 · https://japanlaw.org/l/326AC0000000185/art-99-2/par-1 No person may, with regard to a motor vehicle for which a valid motor vehicle inspection certificate has been issued pursuant to Article 58, paragraph (1) or a light motor vehicle exempt from inspection for which notification of use has been made pursuant to Article 97-3, paragraph (1) (hereinafter referred to as a "motor vehicle issued with a motor vehicle inspection certificate, etc."), carry out any modification of the motor vehicle or a part thereof, attachment or removal of equipment, or other similar act that would cause the motor vehicle to fail to conform to the safety standards. machine translation, not official --- ## Cites - art-99-2/par-1: 第五十八条第一項 → 道路運送車両法 第五十八条第一項 (Article 58, paragraph (1)), art-58/par-1 — https://japanlaw.org/en/road-transport-vehicle-act/art-58/par-1 · https://japanlaw.org/l/326AC0000000185/art-58/par-1 - art-99-2/par-1: 第九十七条の三第一項 → 道路運送車両法 第九十七条の三第一項 (Article 97-3, paragraph (1)), art-97-3/par-1 — https://japanlaw.org/en/road-transport-vehicle-act/art-97-3/par-1 · https://japanlaw.org/l/326AC0000000185/art-97-3/par-1 ## Cited by 1 provision cites this one. No official source publishes this direction. - 道路運送車両法 第百八条第一項第一号 — https://japanlaw.org/en/road-transport-vehicle-act/art-108/par-1/item-1 · https://japanlaw.org/l/326AC0000000185/art-108/par-1/item-1 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 道路運送車両法 — the text in force from 2026-04-01 (https://laws.e-gov.go.jp/law/326AC0000000185/20260401_508AC0000000002), retrieved 2026-10-13 - Japanese Law Translation Database System, Ministry of Justice (法務省) — 道路運送車両法 — its English title as the Ministry of Justice's translation database lists it (https://www.japaneselawtranslation.go.jp/en/laws/view/529), retrieved 2026-09-18 - claude-sonnet-5-5 — Machine translation, batch road-transport-vehicle-act-20261013T120733-032, translated 2026-10-13 - This site's parser, version 189 — 道路運送車両法 — structure, counts, cross-references and defined terms, computed 2026-10-13