(a)      The WSSC shall make surveys, plans, specifications, and estimates for water supply and sanitary sewerage systems in those portions of the sanitary district that the WSSC considers necessary.

      (b)      (1)      The WSSC shall divide the sanitary district into water or sanitary sewerage districts, in the WSSC's judgment, to best serve the needs of the various communities and to promote convenience and economy of installation and operation.

            (2)      The WSSC may proceed with construction in any of the districts that the WSSC considers advisable. However, if the construction is on the motion of the WSSC without petition or request from an interested party, the WSSC may give reasonable notice as the WSSC considers advisable.

      (c)      (1)      On and after June 30, 1968, the WSSC may not install, operate, or exercise any authority over drainage systems in Montgomery County.

            (2)      On and after July 1, 1990, the WSSC may not install, operate, or exercise any authority over drainage systems in the City of Takoma Park.