N.M. Code R. § 1.13.4.6
To ensure that electronic messages, and any attachments which may be transmitted with the electronic message, including text messages, social media and e-mail, that are identified as public records, are retained economically and efficiently for as long as they have legal, fiscal, business or historical value.
[1.13.4.6 NMAC - Rp, 1.13.4.6 NMAC, 3/31/2015; A, 11/30/2015]