Md. Code Ann., Envir. § 12-301
(a) Except as otherwise provided in this section, an individual shall be certified by the Board in an appropriate classification before a waterworks, wastewater works, or industrial wastewater works may employ the individual as:
Added by Acts 1981, c. 237, § 2. Amended by Acts 1987, c. 306, § 3.
Formerly Art. 43, § 406A.