UOCAVA lets uniformed service members request absentee ballots as early as they wish in an election year. Any time after that request they may send the
Federal Write-In Absentee Ballot from outside the US, so they can vote even if they are on extended missions without communication, if they can send it from outside the US. UOCAVA lets covered groups get ballots electronically (email, fax, or web site) from all states. Some states
transmit ballots electronically to other groups. Twenty states require ballots to be returned by mail. Four states allow ballot submission through secure web sites: AZ, CO (if needed), MO, and WV. In 2019-2020 researchers found insecurities in online voting systems used for UOCAVA from Voatz and Democracy Live. The four states allowing online voting and the remaining 27 states have a mix of rules allowing email or fax to return ballots: UT, and WA.
Maine and
Rhode Island tabulate all votes cast in elections based on rules set out by UOCAVA in a single total at the bottom of the states official election result reports (such reports are officially posted in a
csv file structure document) instead of separately tabulating such votes in the same category as all other votes cast in their home towns. ==Executive Order 12642==