They wouldn't need that. And having been SC cleared in the UK, and known a few DV-cleared ones, at least in the UK they don't care if you've smoked pot. They just care that if you have, that you don't mind your family knowing one day. They don't want people who can be blackmailed.
Here it's like this: Don't ever lie to them, "no matter what it is they'll find out."
So, some people don't lie, say they smoked pot in high school and none of them make it to the next step.
I had a twitter convo last year or pre-x whenever with the CTO of some org I can't remember (I don't think centcom, something much smaller) and he mentioned that they've lightened up quite a bit, or at least his program which was a softwar engineering group was more lenient. He was looking for engineers on via twitter on his official account.
