Subpoenas

Federal agency or agents

Federal agencies will general ignore state subpoenas unless Touhy regulations are complied with. United States ex rel. Touhy v. Ragen (1951) 340 U.S. 462, held that federal agencies may create regulations regarding subpoenas. So each federal agency has their own regulations.

United States Department of Justice

28 CFR 16.21

Drug Enforcement Agency

28 CFR 0.103

Treasury

26 CFR 301.9000

Department of Interior

43 CFR 2.880

Health and Human Services

45 CFR 2.1 to 2.6.