What is the oldest written source in this country that mentions this right?

Palau

Article 7 of the Constitution of Palau grants citizens over the age of 18 the right to vote in National and state elections. The Olbiil Era Kelulau (the legislative body) determines the residency requirements of voting in these elections. (Constitute Project, “Palau’s Constitution of 1981 with Amendments through 1992”).

Voting Rights and Suffrage · Country sources (all rights) · Years mentioned: 1981, 1992 · Last edited 2022-12-28 · Edit on GitHub