Each political party, each political committee with issues on the ballot that they are registered to support or oppose, and each candidate may have one poll watcher in each polling room or early voting area at any one time during an election. Poll watchers must be registered voters in the county and cannot be candidates or law enforcement officers. Each political party, each political committee, and each candidate requesting to have poll watchers must designate, in writing to the supervisor of elections, poll watchers for each precinct prior to noon of the second Tuesday preceding the election. Poll watchers for early voting shall be requested in writing to the supervisor at least 14 days before early voting begins.