“Its normal procedure, a clearance is awarded to you for the slot you are in, once out, the clearance is gone.”
Plus, I would think a clearance should be reviewed and have to be updated. You obviously know how it works, and I certainly have no knowledge of this, but it would make sense that maintaining clearance would be an ongoing process subject to ongoing review.
I believe, without looking it up it was a 5 yr review/update thing. I was next to the General so it was a TS. When you leave you sign a DD 2962 debriefing form, which applies to all who leave. You can impress an employer with the 873 form, but you don’t have access after you leave. I can flash the form on any USA base, to look at their TS projects, which would result in my being incarcerated in a federal prison for life. Then again, I’m only a peon to the Elites. They’re Special. I’d put those SOBs who are complaining about losing their clearance on a work gang to build the wall.