Same boundaries for both of us.
This is not how boundaries work. What you have agreed to are "behaviours".
Your boundary is NOT about your partner. It is only about you. It is NOT designed to change his behaviour. Your boundary is normally "I don't like X. When you do X, *I* will protect myself by doing Y". And Y is something FOR YOU.
Unfortunately you cannot "force" him into doing or not doing anything. He *may* decide to change a behaviour for you, but he may not. So you need to decide what is YOUR action based on him doing something.
So for example: "I do not agree with the use of cannabis. If you are high, I will stay at a friends house for 24hrs until you are sober again". Your boundary is not asking him to do anything - it is all about protecting yourself.