Is it just me or have their been a seemingly endless stream of questions that sound like the poster is trying to hide stuff while enlisting? Have we sunk so far as a society that our children now feel the need to scam their way through their lives? Since when did telling the truth and being honest become a bad thing? Sorry for the short rant but this is getting ridiculous in my mind 
If everyone told the truth, then we wouldn't need a security clearance process. Meanwhile, what these new recruits don't seem to comprehend is that the investigation is "open" until you leave the military. Anything, anytime, anywhere...can "raise it's ugly head" and one can find themselves without the precious security badge, clearance, etc. Many postings seem to suggest that some are waiting to "sneak in under the wire" and then celebrate; however, not the case. It all starts over during the reinvestigation.
I'm not familiar with any NNPP policy that outlines a statute of limitations on lying. :-)