Ultra Vires

outside the legal authority of, beyond the jurisdiction of (Latin)

Ultra vires is a Latin phrase that literally means "beyond the power." Its inverse is called intra vires, meaning "within the power".
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Adjective
1. beyond the legal power or authority of a person or official or body etc; "an ultra vires contract"
(antonym) intra vires
(classification) law, jurisprudence
Adverb
1. beyond the scope or in excess of legal power or authority

Beyond power; transcending authority; -- a phrase used frequently in relation to acts or enactments by corporations in excess of their chartered or statutory rights.
  

Without authority. An act which is beyond the powers or authority of the person or organization which took it. - (read more on Ultra vires)