Act Governing the Allocation of Government Revenues and Expenditures Article 20

A government at any level, having obtained permission by law, may operate a monopoly public utility, and may duly impose a franchise fee and permit a private party to operate the utility.The area supplied by a monopoly public enterprise operated by a local government shall be limited to the area under that government's jurisdiction, provided that a stipulation to expand the area supplied may be made by agreement with the local government of a neighboring area.
中文原文 財政收支劃分法第20條
各級政府經法律許可,得經營獨占公用事業,並得依法徵收特許費,准許私人經營。
地方政府所經營獨占公用事業之供給,以該管區域為限;但經鄰近地方政府之同意得為擴充其供給區域之約定。

English translation for reference only; the Chinese text prevails. Not legal advice.