In counties other than counties of the first and second class, the assessors and assistant or registry assessors, performing duties pertaining to the assessment and registration of voters, shall receive, as full compensation for such duties, the sum of five dollars ($5.00) per day for each day actually employed in the performance of such duties. In addition to the compensation above provided, they shall receive the sum of five dollars ($5.00) per day for the special sittings at the polling places before elections and primaries as provided by law.
72 P.S. § 5004