/tə ˈækt wɪð ði ɔːˈθɔrəti ʌv lɔː/ – Phrase
Definition: hành động căn cứ vào pháp luật
A more thorough explanation: To act with the authority of law means to perform an action or make a decision in accordance with legal provisions, regulations, or statutes, thereby exercising the power and jurisdiction granted by law.
Example: The police officer was authorized to act with the authority of law when making the arrest.