The commanding officer shall not perform a marriage ceremony on board his or her ship or aircraft. He or she shall not permit a marriage ceremony to be performed on board when the ship or aircraft is outside the territory of the United States, except:
(a) In accordance with local laws and the laws of the state, territory, or district in which the parties are domiciled, and
(b) In the presence of a diplomatic or consular official of the United States, who has consented to issue the certificates and make the returns required by the consular regulations.