mandatory
1 of 2adjective/ˈmæn.də.ˌtɔ.ri/
1
ordered or required by a rule or law
B2- Wearing a face mask in public places is mandatory to prevent the spread of the virus.
- It is mandatory for all employees to undergo safety training before starting work.
- The completion of the online registration form is mandatory to participate in the event.
- Wearing a seatbelt while driving is mandatory by law in many countries.
- Attending the annual general meeting is mandatory for all shareholders.