Supplementary Provisions, Article 4Transitional Measures Concerning Surnames in the Case of Dissolution of Adoptive Relationship, etc.
第四条（離縁等の場合の氏に関する経過措置）
In the case where a person dissolves an adoptive relationship, or an adoption is annulled, within three months before this Act comes into effect, with regard to the application of the provisions of Article 816, paragraph (2) of the New Act (including as applied mutatis mutandis pursuant to Article 808, paragraph (2) of the New Act), the phrase "within three months of the date of its dissolution" in Article 816, paragraph (2) of the New Act is deemed to be replaced with "within three months of the date on which the Act Partially Amending the Civil Code, etc. (Act No. 101 of 1987) comes into effect".
この法律の施行前三月以内に離縁をし、又は縁組が取り消された場合における新法第八百十六条第二項（新法第八百八条第二項において準用する場合を含む。）の規定の適用については、新法第八百十六条第二項中「離縁の日から三箇月以内」とあるのは、「民法等の一部を改正する法律（昭和六十二年法律第百一号）の施行の日から三箇月以内」とする。