The total number of registered voters is constantly changing as voters move into, out of and around the county. Generally 55 days before Election Day, the voting system is setup, tested and the first ballots are mailed out 45 days before Election Day. At this time, the number of registered voters is identified from the Harris County Clerk's Office Elections Department's records to be used during the election. Consequently, the number of registered voters on the reports reflect the number of registered voters approximately 55 days before Election Day and is not the same as the number of actual registered voters eligible to vote during Early Voting and on Election Day.