33 CFR §5.10

1. (a)To be eligible for membership in the Auxiliary, a person must—
   1. (1)Be a United States citizen, a national of the United States or of its Territories and possessions, or an alien lawfully admitted for permanent residence; and
   2. (2)Meet the standards for enrollment, retention, and conduct established by the Commandant.
2. (b)An applicant who is accepted for membership will be enrolled in the Auxiliary and will be issued a membership certificate and identification card. Possession of a membership certificate or identification card does not entitle a person to any rights or privileges of the Coast Guard or the Coast Guard Reserve except as authorized by the Commandant.