Maryland Environment Section 9-721

      (a)      The powers granted to political subdivisions by Part III of this subtitle are supplementary to any other powers of the political subdivisions.

      (b)      This section does not:

            (1)      Invalidate any procedures initiated or completed by any political subdivision before June 1, 1972; or

            (2)      Limit or modify any provision of any general or local law effective before June 1, 1972.