Section 62-9-1.1 - Additional authority with respect to water and sewer utilitiesA. Notwithstanding any other provision of the Public Utility Act [Chapter 62, Articles 1 to 6 and 8 to 13 NMSA 1978], or any provision of the Municipal Code [Chapter 3 NMSA 1978, except Article 66], or any privilege granted under either act, if any municipality that has not elected to come within the terms of the Public Utility Act, as provided in Section 62-6-5 NMSA 1978, constructs or extends or proposes to construct or extend its water or sewer line or system or water pumping station or reservoir into a geographical area described in a certificate of public convenience and necessity granted by the commission to a public utility rendering the same type of service, the commission, on complaint of the public utility claiming to be injuriously affected thereby, shall, after giving notice to the municipality and affording the municipality an opportunity for a hearing with respect to the issue of whether its water or sewer line, plant or system actually intrudes or will intrude into the area certificated to the public utility, determine whether such intrusion has occurred or will occur. If the commission determines such an intrusion has occurred or will occur, the municipality owning or operating the water or sewer utility shall cease and desist from making such construction or extension in the absence of written consent of the public utility involved and approval of the commission.B. The authority and jurisdiction conferred by Subsection A of this section shall be in addition and cumulative to the independent authority of the commission to determine territorial disputes between public utilities and between mutual domestic water consumer associations and public utilities as provided in Section 62-9-1 NMSA 1978, which provisions shall govern the resolution of a territorial dispute between a municipality that has elected to come within the terms of the Public Utility Act, as provided in Section 62-6-5 NMSA 1978, and any other public utility rendering the same type of service. Provided, however, in the event that a certificate of public convenience and necessity granted to such a municipality overlaps, or conflicts with, a valid certificate previously issued by the commission and exercised within the term required under Section 62-9-4 NMSA 1978, the municipal utility shall be permitted to continue operation of its plant, line and system in existence upon the effective date of this 1991 act and the other public utility may continue service in the area covered by its certificate, subject to the other provisions of the Public Utility Act.C. For purposes of this section, "municipality" means any municipality that has a population of more than two hundred thousand as determined in the most recent federal decennial census and is located in a class A county.