<p>There are 2 issues here. What the OP feels about her son smoking pot and what are the laws in the state they live and the state the son will be going to school. </p>
<p>Separate the issues and deal with them separately. What the OP wants her son to do or not do when really he will be in college in a blink is going to be out of her control. </p>
<p>All you can do it impress upon your son how you view these activities including drinking and keep the door open so he feels he can come to you. It will be very hard to lay down an ultimatum nor will you get what you want if you try.</p>
<p>Second, educate yourself and insist that he educate himself about the laws of the activity that he is indulging in. So there is no surprise to him, no “I didn’t know” what would happen. </p>
<p>Here is a link to Norml that very specifically goes over the laws. In many states it is the paraphernalia that is the problem if caught, not small amounts of pot. </p>
<p>[State</a> Laws](<a href=“http://norml.org/laws]State”>http://norml.org/laws)</p>