1
general::
Phrase(s): make an exception (for someone)
to suspend a rule or practice for someone in a single instance. • Please make an exception just this once. • The rule is a good one, and I will not make an exception for anyone.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Exempt someone or something from a general rule or practice, as in Because it's your birthday, I'll make an exception and let you stay up as late as you want. This expression was first recorded about 1391.
American Heritage Idioms