This chapter shall not apply with respect to the United States Government, any State or local government, or any political subdivision of a State or local government.
Nothing in this chapter shall be construed to prohibit the administration, by the Federal Government, in the performance of any counterintelligence function, of any lie detector test to an employee of a contractor of the Federal Bureau of Investigation of the Department of Justice who is engaged in the performance of any work under the contract with such Bureau.
Subject to paragraph (2) and sections 2007 and 2009 of this title, this chapter shall not prohibit the use of a polygraph test by any employer authorized to manufacture, distribute, or dispense a controlled substance listed in schedule I, II, III, or IV of section 812 of title 21.