If he stops for one month (and I agree, you won't really KNOW if he sneaks drinks), that doesn't mean he will quit for good. One month really isn't that long. If I was already out of the house, I'd insist on at LEAST 6 months (preferably a year) of total abstinence along with regular participation in a program. If he is only quitting to get you back, it doesn't sound like he's serious about it.
You always have the right to change your mind. As long as you are living away from him, you have the right to require whatever you want before you agree to move back with him. That is not controlling him, that is taking care of YOU!