A consortium of scholars and groups has released this report. Here is the summary:

Seven states currently discriminate on the basis of age in their vote-at-home (also known as absentee ballot) systems. Specifically, Texas, South Carolina, Indiana, Tennessee, Mississippi, Louisiana, and Kentucky allow older voters to vote at home for any reason, but younger voters need specific excuses. Missouri may soon join this group of states if the Governor signs a pending bill to modify voting procedures during the COVID-19 pandemic.

In this novel report, a coalition including Equal Citizens, The Andrew Goodman Foundation, UCLA Voting Rights Project, Vote at Home Institute, and Stris & Maher LLP explains why these laws are unconstitutional under the Twenty-Sixth Amendment, which prohibits age discrimination in voting.