I've had this with both my sons.
The first thing to know is there is no such thing as fair
By that I mean do not allow your decision making to be clouded by his teenaged perception of what is fair
I gave my sons an ultimatum - off the internet by midnight or there would be repercussions. They did not comply. I removed both of their hard drives.
'It's not fair!' they cried, 'You can't do that!' they cried. I told them I couldn't care less.
Two days later they promised to comply. They got their drives back with the promise that other luxuries such as electricity would be removed if they did not comply in the future.
This is basic discipline. Give him a boundary and what will occur if it is not met. Then carry out the threat if he does not comply with your wishes