/əˈkɔːrdɪŋ tə juːsɪdʒ/ – Prepositional Phrase
Definition: theo tập tục.
A more thorough explanation: This Pharse is often used in legal documents to indicate that something is done or interpreted in a particular way because it is customary or accepted practice, even if there is no explicit rule or law governing it.
Example: The contract will be terminated according to usage in the industry.