N.M. Code R. § 19.15.12.8
The division shall determine whether a particular well or pool is a gas or oil well, or a gas or oil pool, and from time to time classify and reclassify wells and name pools accordingly, and shall determine the limits of a pool or pools producing oil or gas and from time to time re-determine such limits.
[19.15.12.8 NMAC - Rp, 19.15.1.15 NMAC, 12/1/08]