(a) On or before October 1, 1990, and thereafter as necessary the Property Valuation Training and Procedures Commission shall perform the following duties:
(1) Devise training and certification criteria for county assessors and their employees and members of county commissions, which shall include a definition of “appropriate staff member” as the term is used in section six of this article relating to required training, which definition shall include deputy assessors as provided for in section three, article two of this chapter;