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

Indonesia

Citizens of Indonesia vote for members of the People’s Representative Council as long as they are over 17 and have a valid voter ID card. (Constitute Project, “Indonesia’s Constitution of 1945, reinstated in 1959 with Amendments through 2002”).

Voting Rights and Suffrage · Country sources (all rights) · Years mentioned: 1945, 1959, 2002 · Last edited 2022-12-28 · Edit on GitHub