Alaska Stat. § 25.05.301
In the solemnization of marriage, no particular form is required except that the parties shall assent or declare in the presence of each other and the person solemnizing the marriage and in the presence of at least one competent witness that they take each other to be husband and wife. A person is competent to solemnize or witness a marriage if the person is of sound mind capable of understanding the seriousness of the ceremony. At the time of the ceremony, the person solemnizing the marriage shall complete the certification on the original marriage certificate. The person solemnizing the marriage and the attending witness shall sign the original marriage certificate and the necessary copies. The witness must be 18 years of age or older. The witness shall communicate with both parties before or after the ceremony, but before signing the original marriage certificate and the necessary copies, and confirm that each party intends to marry the other party. The marriage certificate must state that the person solemnizing the marriage and the witness have confirmed with both parties that they are entering the marriage intentionally and in the exercise of each party's own free will.
AS 25.05.301