It actually works three ways:
1) The state LEO can enforce state law on federally owned land located within the state using their state peace officer powers. There is no need for any written agreement with the BLM. The federal ownership of the land doesn't affect the state authority. By the same token, a state LEO doesn't need any authorization from Amazon to enforce state law on property owned by Amazon. Things are a bit different when there is a federal "reservation" established on federally owned land. I haven't had to deal with any law in that regard and am not familiar with the distinctions. But few federally owned properties are "reservations."
2) A federal LEO can enforce state law on the federal property as federal law (in essence the feds "borrow" the state law as federal law). Violators have their cases tried in federal court, using the elements of the state law. The federal agents using this avenue do not require any authorization of the Sheriff, or Chief of Police and those officials have no standing to restrict the federal LEOs in the use of this avenue.
3) Federal LEO's can also enforce California state law upon federal lands using their state law authority under Penal Code section 830.8. When using this legal avenue, the cases are tried in California state courts. This avenue requires that BLM employees have the written authorization of the Sheriff or Chief of Police of the jurisdiction. Other federal employees do not need the authorization. PC 830.8 additionally grants the additional law enforcement powers of a state peace officer to federal LEO's who meet the training requirements of PC 832 and who have the written authorization of the Sheriff, or Chief of Police.
1) The state LEO can enforce state law on federally owned land located within the state using their state peace officer powers. There is no need for any written agreement with the BLM. The federal ownership of the land doesn't affect the state authority. By the same token, a state LEO doesn't need any authorization from Amazon to enforce state law on property owned by Amazon. Things are a bit different when there is a federal "reservation" established on federally owned land. I haven't had to deal with any law in that regard and am not familiar with the distinctions. But few federally owned properties are "reservations."
2) A federal LEO can enforce state law on the federal property as federal law (in essence the feds "borrow" the state law as federal law). Violators have their cases tried in federal court, using the elements of the state law. The federal agents using this avenue do not require any authorization of the Sheriff, or Chief of Police and those officials have no standing to restrict the federal LEOs in the use of this avenue.
3) Federal LEO's can also enforce California state law upon federal lands using their state law authority under Penal Code section 830.8. When using this legal avenue, the cases are tried in California state courts. This avenue requires that BLM employees have the written authorization of the Sheriff or Chief of Police of the jurisdiction. Other federal employees do not need the authorization. PC 830.8 additionally grants the additional law enforcement powers of a state peace officer to federal LEO's who meet the training requirements of PC 832 and who have the written authorization of the Sheriff, or Chief of Police.
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