Each county election commission must have an office in the county courthouse or another public building, and may designate additional locations if they are needed. A schedule of minimum office hours, which depends on the population of the county and the certification status of the administrator, is set out in T.C.A. § 2-2-108. The county election commission may also keep additional office hours as needed to (1) register qualified applicants, (2) replace lost registration cards, (3) transfer or change registrations, and (4) perform its other duties. T.C.A. § 2-2-108.