N.M. Stat. § 58-10-36
Original real estate loans.
Every association may make real estate loans to members, secured by a mortgage,
deed of trust or other instrument creating or constituting a first and prior lien on the real
estate, and may make additional real estate loans secured by liens subsequent to its
own first lien upon the same property. Additional security may also be taken by the
association in connection with any such loan.