The law prevents state police from being used to enforce federal weapons statutes.
It is legal.
Printz vs US established that local/state LEO cannot be compelled to enforce federal laws.
It was based on this:
[t]he Federal Government may not compel the States to enact or administer a federal regulatory program". New York v. United States, 505 U.S. 144, 188 (1992).
Federal agents can still enforce federal law, but state agents are not allowed to support the activity. Perfectly legal.
It is legal.
Printz vs US established that local/state LEO cannot be compelled to enforce federal laws.
It was based on this:
[t]he Federal Government may not compel the States to enact or administer a federal regulatory program". New York v. United States, 505 U.S. 144, 188 (1992).
Federal agents can still enforce federal law, but state agents are not allowed to support the activity. Perfectly legal.

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