Under Chapter II, Rights, Liberties and Guarantees in Political Participation, Article 54 of the Cape Verde Constitution all citizens at least 18 years of age have the right to vote and participate in political life directly and through freely elected representatives (Constitute Project, “Cape Verde's Constitution of 1980 with Amendments through 1992”).

References:

Cape Verde's Constitution of 1980 with Amendments through 1992: https://www.constituteproject.org/constitution/Cape_Verde_1992