N.M. Admin. Code § 19.2.13.21
The timber sale contract shall contain sufficient, proper and adequate provisions therein requiring the contract holder to dispose of the brush resulting from the sale. The term "brush" as used herein shall mean to include all tops, slash and debris resulting from logging operations, including stems and limbs or portions thereof not exceeding four inches in diameter. The sufficiency of the brush disposal work done by the contract holder shall be subject to the approval of the commissioner, or the commissioner's duly authorized representative. In no instance shall brush disposal be allowed to fall behind cutting, except when the depth of snow or other adequate reason beyond the control of the contract holder makes proper disposal impracticable. In such an event, the disposal of brush may, with the written consent of the representative of the commissioner in charge, be postponed until conditions are more favorable.
N.M. Admin. Code § 19.2.13.21