Section 12-301 - Certification required(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: (2) An operator or industrial operator in a job function determined by the Secretary.(b) This section does not prevent a governmental agency or a person from continuing to employ in a waterworks, wastewater works, or industrial wastewater works, until July 2, 1982, an operator or industrial operator who is not certified under this title.