Constitutional amendment (first reference); marriage between two adult persons; repeal of same-sex marriage prohibition; affirmative right to marry. Repeals the constitutional provision defining marriage as only a union between one man and one woman as well as the related provisions that are no longer valid as a result of the United States Supreme Court decision in Obergefell v. Hodges , 576 U.S. 644 (2015). The amendment prohibits the Commonwealth and its political subdivisions from denying the issuance of a marriage license to two adult persons seeking a lawful marriage on the basis of the sex, gender, or race of such persons. The Commonwealth and its political subdivisions are required to recognize any lawful marriage between two adult persons and to treat such marriages equally under the law, regardless of the sex, gender, or race of such persons.