Another issue that I do not know the answer to is how Nevada’s “open range” law impacts on his cattle grazing rights.
Per Article 1 Section 8 one of the enumerated powers of Congress is to have exclusive jurisdiction over Washington DC and any lands the US Government owns.
As such, no State law has authority on federal lands without the federal government or its agents formally recognizing that law as policy. For example, the reason you have to obey state driving laws is the BLM has a policy that says the state traffic/driving laws have to be obeyed.
The Taylor Grazing Act was passed in 1934 which started the charging of fees for grazing access. Bundy and his family have previously paid those fees until 1993 when his lease came up for renewal.