@thereal_renaissance_man @AkomoCombine
Correct.
Merely (say) passing an SF-85 or SF-86p is NOT enough to grant adequate clearance (though the latter, where one is qualifying for a Public Trust position) is reasonably invasive. I've seen even those held up endlessly over the smallest of matters.
TS/SCI+ (Full Lifestyle Poly) is about the highest I am familiar with offhand.