The board shall adopt such rules and regulations as may be necessary for the administration of this chapter, and which shall include at least the following provisions:
(1) The basis for classification of wastewater treatment plants as required by section 340B-2;
(2) Criteria for the qualification of applicants for operator certification corresponding to each of the classifications referred to in paragraph (1) of this section;
(3) Procedures for examination of candidates and renewal of certificates; and
(4) Procedures for the revocation of certificates.