technically no,

there are no state stores selling MJ in this state, therefore you cannot legally buy state regulated MJ, therefore you still cannot posses ANY as of right now technically since there are no state stores to sell it to you... MMJ Card holders are a different story, as the dispensaries arent state regulated per say...

possession of less than an ounce of legal state sold MJ is legal, possession of an ounce of weed you just bought from your buddy that doesnt have a card is not legal possession of state sold marijuana... they likely wont take you to jail if you are in possession of say 3/4 of an ounce of weed you didnt buy from the state, but they may ticket you for it... because as of right now, you cant obtain it, so they know for sure you bought it illegally...

growing it without an MMJ card is still illegal, the license fees for cultivation and resale are pretty high after the first year... you can and will get nailed if you are caught illegally growing and selling it, then they will hit you with tax evasion and other crimes as well, and throw out the "he had 2 ounces" part and hit you where it really hurts...

the prices per ounce from what ive heard are going to be in the 330 dollar range, which is ridiculously high priced....

502 has a bunch of holes in it, if you dont pay attention to, you will screw yourself if you decide to partake in the smoking of MJ...