Section 166.309 - Who determines livestock class and livestock ownership requirements on permitted Indian land?(a) Tribes determine the class of livestock and livestock ownership requirements for livestock that may be grazed on range units composed entirely of tribal land or which include government land, subject to the grazing capacity prescribed by us under § 166.305 of this part.(b) For permits on range units containing, in whole or part, individually-owned Indian land, we will adopt the tribal determination in paragraph (a) of this section.