Within the first 3 months following appointment, a commissioner from Montgomery County shall successfully complete: the training required under § 3–213 of the General Provisions Article; the Maryland Department of Planning’s Planning Commissioner, Planning Board and Board of Appeals Education Course; and appropriate training on: Maryland Public Ethics Law; and Maryland–National Capital Park and Planning Commission policies and practices on: ethics; drug– and alcohol–free workplace; and workplace harassment and intimidation. Failure of a commissioner to meet the requirements of subsection (a) of this section does not invalidate a decision made by the Commission or establish a private cause of action.