I don't know if you've been charged with a MJ crime, but certainly if you've tried it. I got accepted with multiple MJ "experiences". It asks on the EPSQ if you've ever been charged with a drug-related crime, so it's possible that this can be waived. Certainly, time and remorse are your friends. If this happened years back and you write a convincing letter stating your remorse and absolute conviction that you will never be tempted to even look up MJ in the dictionary again, it may work. Apply...can't hurt.