N.M. Code R. § 12.11.3.10
Every registered broker-dealer not subject to 12.11.3.8 NMAC shall preserve for at least five years, the most recent two years in an easily accessible place, all records required under 12.11.3.9 NMAC except that records required under Subsections J and L of 12.11.3.9 NMAC shall be preserved by the broker-dealer for at least five years after the closing of the account; and records required under Subsection N of 12.11.3.9 NMAC shall be preserved by the broker-dealer for at least five years after withdrawal or expiration of its registration in this state. After a record or other document has been preserved for one year as required under this section, a microfilm copy thereof may be substituted for the remainder of the required period.
N.M. Code R. § 12.11.3.10