Wyoming Statutes Title 41. Water § 41-3-116. Permit for watering livestock on federal land

(i) “Allotment” means a designated area of federal land available for livestock grazing;

(ii) “Animal unit month” or “AUM” means the amount of forage needed to sustain one (1) cow and her calf, one (1) horse or five (5) sheep or goats for one (1) month;

(iii) “Federal agency” means the United States, the President of the United States and any department, corporation, agency or instrumentality heretofore or hereafter created, designated or established by the United States;

(iv) “Grazing permit” means a permit, lease or other document authorizing livestock to graze on an allotment;

(v) “Livestock” means as defined by W.S. 11-22-101(a)(ii) but does not include wild horses claimed by the federal government under the federal Wild Free-Roaming Horses and Burros Act, P.L. 92-195.

(i) Only be issued in the name of a federal agency jointly with a person or grazing association who has the right to use a grazing permit;

(ii) Be appurtenant to the allotment or land on which the livestock is watered;

(iii) Not be changed under W.S. 41-3-104 or amended under W.S. 41-4-514 without seeking the consent of the holder or holders of a valid grazing permit to graze livestock on the allotment.

(i) The nonuse is caused by, in whole or in part, a federal agency's reduction of the AUMs on the allotment; or

(ii) The nonuse is voluntary because a grazing permit holder chooses not to graze livestock on that allotment, provided that the nonuse shall not exceed five (5) successive years.