N.M. Admin. Code § 19.27.66.10
Beginning at the southeast corner of section 20, township 34 south, range 17 west, NMPM, a point on the border between the United States of America and Mexico; thence west along said border a distance of approximately 10.5 miles to the intersection of the of the international border with the of drainage divide between the Playas valley basin and the Animas river stream system; thence northerly along the drainage divide between the Playas valley basin and the Animas river stream system to its intersection with the northern boundary of section 6, township 28 south, range 18 west, NMPM; thence east along township line to the northeast corner of section 3, township 28 south, range 18 west, NMPM; thence south along section lines to the southeast corner of section 34, township 28 south, range 18 west, NMPM; thence east along township line to the northeast corner of section 3, township 29 south, range 18 west, NMPM; thence south along section lines to the southeast corner of section 10, township 29 south, range 18 west, NMPM; thence east along section line to the northeast corner of section 14, township 29 south, range 18 west, NMPM; thence south along section lines to the southeast corner of section 35, township 29 south, range 18 west, NMPM; thence east along township line to the northeast corner of section 1, township 30 south, range 18 west, NMPM; thence south along range lines to the southeast corner of section 24, township 33 south, range 18 west, NMPM; thence east along section lines to the northeast corner of section 29, township 33 south, range 17 west, NMPM; thence south along section lines to the southeast corner of section 20, township 34 south, range 17 west, NMPM, a point on the border between the United States of America and Mexico, being the point of origin.
N.M. Admin. Code § 19.27.66.10