license

a legal document giving official permission to do something

freedom to deviate deliberately from normally applicable rules or practices (especially in behavior or speech)

excessive freedom; lack of due restraint; "when liberty becomes license dictatorship is near"- Will Durant; "the intolerable license with which the newspapers break...the rules of decorum"- Edmund Burke

the act of giving a formal (usually written) authorization

authorize officially; "I am licensed to practice law in this state"