§ § 8-502Challenges; generally

any person may be challenged as to his right to vote, or his right to
vote by early mail, absentee, military, special federal or special
presidential ballot. Such challenge may be made by an inspector or
clerk, by any duly appointed watcher, or by any registered voter
properly in the polling place. An inspector shall challenge every person
offering to vote, whom he shall know or suspect is not entitled to vote
in the district, and every person whose name appears on the list of
persons to be challenged on election day which is furnished by the board
of elections.