(1) Every senior officer of the Commonwealth Secretariat other than a person who is a citizen of the United Kingdom and colonies by reason of his or her birth, or registration as such, in Saint Lucia, and any member of his or her family forming part of his or her household, other than a member who is a Commonwealth citizen only by reason of her birth, or registration as a citizen of the United Kingdom and colonies, in Saint Lucia, shall have the like privileges and immunities as are accorded by law to a diplomatic agent and the members of his or her family forming part of his or her household.