42 USC 3796gg8 - Polygraph testing prohibition

(a) In general 
In order to be eligible for grants under this subchapter, a State, Indian tribal government, territorial government, or unit of local government shall certify that, not later than 3 years after January 5, 2006, their laws, policies, or practices will ensure that no law enforcement officer, prosecuting officer or other government official shall ask or require an adult, youth, or child victim of an alleged sex offense as defined under Federal, tribal, State, territorial, or local law to submit to a polygraph examination or other truth telling device as a condition for proceeding with the investigation of such an offense.
(b) Prosecution 
The refusal of a victim to submit to an examination described in subsection (a) of this section shall not prevent the investigation, charging, or prosecution of the offense.