An owner must not begin construction or substantial alteration of a private swimming pool without a building permit. The Department of Permitting Services must not issue a building permit for a private swimming pool until the owner has applied for a building permit for the fence or wall required to enclose the pool under Section 51-15. (1990 L.M.C., ch. 1, § 1; FY 1991 L.M.C., ch. 1, § 1; 1996 L.M.C., ch. 20, § 1; 1998 L.M.C., ch. 12, § 1; 2001 L.M.C., ch. 14, § 1; 2002 L.M.C., ch. 16, § 2.)