Miss. Code Ann. § 21-27-207

Both the board and commission may adopt, modify, repeal and promulgate, after due notice and hearing, and may make exceptions to and grant exemptions and variances from and may enforce those rules, regulations and procedures as are necessary or appropriate to effectuate the duties and responsibilities of these agencies arising under Sections 21-27-201 through 21-27-221. The rules, regulations and procedures shall include, but not be limited to, the following: criteria for classifying municipal and domestic community water systems, nontransient, noncommunity water systems and wastewater facilities; qualifications for operators of community water systems, nontransient, noncommunity water systems and wastewater facilities; certification of operators of commercial Class I rubbish sites; procedures for examining or testing applicants for operator certificates; procedures and fees for issuing, reissuing, modifying, revoking or terminating operator certificates; and reciprocal certification of operators certified in other states having certification requirements not less stringent than those established by the board and commission. Any increase in the fees charged by the board under this section shall be in accordance with the provisions of Section 41-3-65.