# 私的独占の禁止及び公正取引の確保に関する法律 / Act on Prohibition of Private Monopolization and Maintenance of Fair Trade — 第十二条 (Supplementary Provisions, Article 12) This is the Markdown twin of https://japanlaw.org/en/antimonopoly-act/suppl-4161-76/art-12. Every law, and how to address a provision: https://japanlaw.org/llms.txt. The same laws as MCP tools (no sign-in): https://japanlaw.org/mcp. - Law: 私的独占の禁止及び公正取引の確保に関する法律 (Act on Prohibition of Private Monopolization and Maintenance of Fair Trade), 昭和二十二年法律第五十四号 - English title "Act on Prohibition of Private Monopolization and Maintenance of Fair Trade": Ministry of Justice translation - 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: 第十二条 (Supplementary Provisions, Article 12)（罰則の適用等に関する経過措置） — address `suppl-4161-76/art-12` - Text in force since: 2026-05-21 - URL (the page that opens at this provision): https://japanlaw.org/en/antimonopoly-act/suppl-4161-76/art-12 - e-Gov law ID: 322AC0000000054 — never renamed. A permanent link, `/l/{lawId}/{address}` on this site, redirects to the page. - Every provision below carries its address and its URL 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. --- ### 第十二条（罰則の適用等に関する経過措置） — Transitional Measures Concerning Application of Penal Provisions and Other Matters caption: machine translation, not official suppl-4161-76/art-12 · https://japanlaw.org/en/antimonopoly-act/suppl-4161-76/art-12 **第一項** 施行日前にした行為並びに附則第二条第一項、第三条第一項、第四条、第五条第一項、第九項、第十七項、第十九項及び第二十一項並びに第六条第一項及び第三項の規定によりなお従前の例によることとされる場合における施行日以後にした行為に対する罰則の適用については、なお従前の例による。 suppl-4161-76/art-12/par-1 · https://japanlaw.org/en/antimonopoly-act/suppl-4161-76/art-12/par-1 With regard to the application of penal provisions to acts committed before the Effective Date and to acts committed on or after the Effective Date in the cases where the provisions then in force continue to govern pursuant to the provisions of Article 2, paragraph (1), Article 3, paragraph (1), Article 4, Article 5, paragraphs (1), (9), (17), (19) and (21), and Article 6, paragraphs (1) and (3) of the Supplementary Provisions, the provisions then in force continue to govern. machine translation, not official --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 私的独占の禁止及び公正取引の確保に関する法律 — the text in force from 2026-05-21 (https://laws.e-gov.go.jp/law/322AC0000000054/20260521_505AC0000000063), retrieved 2026-11-06 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Act on Prohibition of Private Monopolization and Maintenance of Fair Trade — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/5212/tb), retrieved 2026-11-06 - claude-sonnet-5-5 — Machine translation, batch antimonopoly-act-20261106T060022-012, translated 2026-11-06 - This site's parser, version 225 — 私的独占の禁止及び公正取引の確保に関する法律 — structure, counts, cross-references and defined terms, computed 2026-11-06