Before people can take part in an election in the united states, they must

register with their states to vote.

Explanation:

The purpose of the voting registeration is to ensure that there is no illegal votes conducted to manipulate the resut.

Without the registration, citizens from other states could come to different states in order to vote for their candidates multiple times without getting detected

answer; substantive law;

answer; ///attempts to change more than once behavior at the same time;