Voters must be at least eighteen. The voting age used to be twenty-one years old, until the Constitution was changed in nineteen seventy-one. Here is another fact. Until nineteen twenty, the Constitution did not permit women to vote. Voters must also be American citizens. And they must be registered to vote in the area where they live. Their names must appear on a local election list. In many states, a person must register at least two to. Voters press on a computer screen to enter their choices. But some people question the security of these machines, especially without a printed record of the votes. One way to avoid any machine at all is to vote early. Election officials must receive the ballot on or before Election Day. This way of voting is increasingly popular. It avoids any wait at voting stations. But there are also questions about the security of absentee ballots against the possibility. Voters use a device to make holes in the ballot to mark their choices. Then a computer passes light through the holes to count the votes. But these devices are also being replaced. The problems with vote counting in.