/əˈfɪʃəl lɔː/ – Phrase
Definition: đạo luật đã được thông qua, đạo luật đã có hiệu lực, đạo luật chính thức.
A more thorough explanation: Legislation or legal norms that have been formally approved and enacted by a competent authority, such as a government body or legislative institution, and are thus recognized as legally binding and enforceable within a jurisdiction.
Example: The official law states that all individuals must wear a seatbelt while driving a motor vehicle.