29 U.S.C. § 2009 : US Code - Section 2009: Effect on other law and agreements

Search 29 U.S.C. § 2009 : US Code - Section 2009: Effect on other law and agreements

Except as provided in subsections (a), (b), and (c) of section
2006 of this title, this chapter shall not preempt any provision of
any State or local law or of any negotiated collective bargaining
agreement that prohibits lie detector tests or is more restrictive
with respect to lie detector tests than any provision of this
chapter.