noun, noun which may take the genitive case particle 'no'
exceeding one's authority; unauthorized act; ultra vires
Refers to acting beyond the powers or authority one has been given. Common in compounds and phrases such as 越権行為 and 越権の; the legal term 'ultra vires' is a specialized translation in legal contexts.
That is clearly an act exceeding one's authority.
Signing the contract without the president's approval is an overstepping of authority.
He exceeded his authority and signed the contract.
The decision was criticized as an act that exceeded proper authority.