Go here to view a slide show on the evolution of Paricutin prepared by Scott Rowland. Sources of Information: Foshag, W.F., and Gonzalez-Reyna, J., 1956, Birth and development of Paricutin volcano: U.S. Geological Survey Bulletin 965-D, p. 355-489.
In 1971, the Twenty-sixth Amendment set the legal voting age at 18 for both US federal and state elections.
The simple requirements for federal election voting eligibility include being over eighteen (18) years of age and a U.S. citizen, by either birth or the naturalization process. Plus, people who are in prison are typically not permitted to vote.