As lawmakers here in Pennsylvania continue efforts to make recreational marijuana legal, all state residents have to do now is cross the river to New Jersey to buy it as long as they are 21 or older. Millions of Pennsylvanians now have access to legal marijuana, and plenty of them are crossing the state border to get it. State Police warn however, that you could get in trouble for carrying marijuana across state lines, because it is still not yet legal here. A Pennsylvania resident who brings pot across the state line could be charged.