R.I. Gen. Laws § 30-3-27: Qualifications of enlisted persons.

Hereafter the qualifications for enlistment and reenlistment in the national guard; period or periods of enlistment; form of enlistment contract to be signed; and oath of enlistment to be subscribed to; shall be as provided by the laws of the United States and the regulations pertaining to the national guard, and of this state.