Under NMPSC Rule 720 [17.12.720 NMAC] regulated water utilities are required to maintain financial accounts in either of two (2) formats. Class A and Class B water utilities as defined in NMPSC Rule 710 [17.12.1 NMAC] shall keep their financial records according to the NARUC Uniform System of Accounts for Class A and Class B Water Utilities. Class C and Class D water utilities as defined in NMPSC Rule 710 [17.12.1 NMAC] may keep their financial records either pursuant to the New Mexico Uniform System of Accounts for Class C and Class D Water Utilities, included in the Appendix to NMPSC Rule 720 [17.12.720 NMAC], or according to the NARUC Uniform System of Accounts for Class C and Class D Water Utilities.
N.M. Admin. Code § 17.12.720.9