^ abNeither performed nor recognized in some tribal nations. Recognized but not performed in several other tribal nations and American Samoa.
^Registered foreign marriages confer all marriage rights. Domestic common-law marriages confer most rights of marriage. Domestic civil marriage recognized by some cities.
^A "declaration of family relationship" is available in several of Cambodia's communes which may be useful in matters such as housing, but is not legally binding.
^Guardianship agreements, conferring some limited legal benefits, including decisions about medical and personal care.
^Inheritance, guardianship rights, and residency rights for foreign spouses of legal residents.
Since 1997, the U.S. state of Hawaii has offered reciprocal beneficiary registration for any adults who are prohibited by state law from marrying, including both same-sex and opposite-sex couples.