The purpose of NMPSC Rule 750 [17.12.750 NMAC] is to promote good public utility practices, to encourage efficiency and economy, and to establish minimum standards to be observed in the design, construction, and operation of waterworks facilities by water utilities operating under the jurisdiction of the Commission. The standards herein prescribed are intended as minimum standards. The provisions hereof shall not be construed to require the replacement or abandonment of facilities in use at the time of the initial adoption of these provisions in former General Order No. 42 unless the Commission so directs.
N.M. Admin. Code § 17.12.750.6