Required by law or a rule; obligatory.; Involving or exercising compulsion; coercive.
‘compulsory military service’
‘it was compulsory to attend mass’
‘Learning it should be compulsory for a driver’s licence.’
‘Many parents believed that to give girls education beyond the compulsory age was a waste of money.’
‘What he can’t do is to make attendance compulsory, or threaten that non-attendance will delay other qualifications.’
‘Education is free and compulsory between the ages of seven and thirteen.’
обязательный, принудительный, вынужденный