(a) In Part VII of this subtitle the following words have the meanings indicated.
(b) “Shared facility” means a water system or sewerage system that serves:
(1) More than 1 lot;
(2) More than 1 single family residence or its equivalent; or
(3) A series of water systems or sewerage systems that each serve 1 lot.
(c) “Shared facility area” means the territory served by a shared facility.