Your card is only good in the state in which it was issued.

My friend with MS has to go to Cali on business soon; she called some dispensaries already to see if they would honor a Vermont med card, and some said they would, while some would NOT. This is entirely separate from what the COPS would honor, and if she gets pulled over in possession in Cali, even with a VT card she may still have problems- I think that would be up to the discretion of the individual officer whether he would simply look the other way. Are you willing to risk it?

If I were you, I'd save the money on something that is not going to do you any good in court, and spend it on a light and fan, and grow your own until the law changes.

Good luck.