Note that there are different clearances with different restrictions and obligations. Lower level clearances are not much different than standard background che

Note that there are different clearances with different restrictions and obligations. Lower level clearances are not much different than standard background checks to obtain an HSPF-12 credential (US Gov ID badge) while higher level clearances may require periodic polygraph tests and other additional restrictions. https://www.commerce.gov/osy/programs/credentialing/hspd-12-credentialing https://www.commerce.gov/osy/programs/credentialing/hspd-12-... https://en.m.wikipedia.org/wiki/Security_clearance https://en.m.wikipedia.org/wiki/Security_clearance