N.M. Admin. Code § 19.2.7.12
Separate applications shall be made for each lease and application shall be deemed for all acreage listed thereon or for that part thereof as may be available for leasing. If an application covers more than two thousand five hundred sixty (2,560) acres, or if all legal subdivisions applied for are not contiguous, the application shall be rejected; provided, however, if an application covers less than six hundred forty (640) acres, or if all legal subdivisions are not contiguous, the application shall be rejected; provided, however, a lease, or leases, may be issued covering less than six hundred forty (640) acres if the subdivision or parcel is isolated from and not contiguous with other parcels available for lease. An application which covers less than a legal subdivision or less than an entire parcel in the case of a navigable river or lake bed shall be rejected.
N.M. Admin. Code § 19.2.7.12