Notwithstanding any other provision herein, side agreements that do not constitute assignments but which define or set out the various interests of other parties in a mineral lease may be filed with the commissioner as miscellaneous instruments upon payment of the filing fee set out in the schedule of fees. Such filing shall constitute constructive notice to the world of the existence and the contents thereof. Side agreements are not binding upon the commissioner and do not change the lessee's obligations under any mineral lease. The lessee of record shall remain responsible for compliance with the terms and conditions of the mineral lease.
N.M. Admin. Code § 19.2.2.64