72 Pa. Stat. § 5341.4
The board shall appoint, for terms of six years each, a chief personal property assessor whose salary shall be seven thousand five hundred dollars per annum, eight personal property assessors each of whose salaries shall be five thousand dollars per annum, thirty-six real estate assessors, each of whose salaries shall be five thousand dollars per annum, and thirty-six assistant real estate assessors each of whose salaries shall be two thousand five hundred dollars per annum. Upon the occurrence of any vacancy in any of said offices, the board shall appoint a successor for the full term of six years. The board may from time to time increase the number of personal property assessors, real estate assessors, and assistant real estate assessors appointed by it, as it shall find necessary, subject, however, to the approval of the tax-levying body of the county. The board shall also appoint such number of clerks, stenographers and other office employes as the board shall find necessary to serve at the pleasure of the board, whose compensation shall be fixed by the tax-levying body of the county.
72 P.S. § 5341.4