This is generally quite restricted. I personally had to undego a "Public trust" civilian security clearance (which is binding for life unlike the 75 years of TS-SCI).
Public trust is not a security clearance; it is simply a more involved background check. A security clearance is only granted after a T3/T5 investigation and adjudication of the request. The SF312 NDA signed in order to receive your clearance does not expire.
Public trust is not a security clearance; it is simply a more involved background check. A security clearance is only granted after a T3/T5 investigation and adjudication of the request. The SF312 NDA signed in order to receive your clearance does not expire.