3 GCA § 3101: Persons Entitled to Vote: Compliance with Registration Provisions.

Every person not confined to a mental institution, nor judicially declared incompetent , nor incarcerated under a sentence of imprisonment, who is a citizen of the United States over eighteen (18) years of age, or who shall have reached his or her eighteenth (18th) birthday by the day set for election, who is a resident of Guam, as defined in § 9123, Chapter 9 of this Title, and who complies with the provisions of this Title governing the registration of electors is entitled to vote at any general election held within Guam; provided, that in the election of municipal, division or district officers only those otherwise qualified electors who reside within the municipality, division or district concerned shall have the right to vote for such municipal, division or district officers.