I've been researching going 35N thru BEAR. I know I need at least TS clearance interim, I already hold a Secret, prior to being accepted into training and during AIT a successful TS followed by a counter intel investigation maybe even polygraph. My only concern regarding these probes and the SF86 is that I used marijuana before I joined. The useage may have been frequent enough to be considered "regular". The requirements for 35N mentions nothing against past useage, unlike 35L&F but, will this bar me from TS or 35N?
Did you mention that when asked about it for your secret? Something coming to light like that during your TS investigation could not only keep you from getting it, but have your Secret revoked. The only polygraph you will need is counter-intel and they don't ask you if you've done drugs in that one. They just want to make sure you won't switch teams.