We aren't allowed to eat during the lessons but we are allowed to eat during the break.
We aren't allowed to use ours mobile phone but we are allowed to bring ours mobile phone.
We aren't allowed to drink alcohol but we are allowed to drink water.
We aren't allowed to go to the toilets during the lessons but we are allowed to go to the toilets during the break.
We aren't allowed to chat during the lessons but we are allowed to chat during the break.