(a)      If the WSSC extends its general water supply or sewerage system to a municipally or privately owned water supply or sewerage system and the WSSC is ready to connect with the system, or if the WSSC considers such action to be expedient, advisable, and proper for the adequate operation of the system under the WSSC's jurisdiction, the WSSC may purchase the system.

      (b)      If the WSSC and the owner fail to agree to the purchase price or conditions of purchase of the water or sewerage system, the WSSC may acquire the system by condemnation, as provided in this article.