What law are you talking about? The CHP law in NC? It's identical to most CHP laws in every other state. NC was a "no issue" concealed carry state prior to 1995; i.e., you could not get a permit to carry in the state at all.
Even if it was not on the books at the time, it does not make it an Ex Post Facto law. Such a law makes something illegal that was legal at the time, and enforcement retroactive. What the OP did (doing drugs while in the armed forces) was illegal then, and it is still illegal. The penalty is still the same in the military. The provision for carry has actually gotten LESS restrictive in NC (going from no issue to shall issue) over time, but the restriction on the level of discharge from military service that applies has not changed at all
My mistake, still IMHO excessive, heavy handed laws from a to often draconian oppressive gooberment.
