法定

例句：

1. 1. The law requires that all citizens must vote in the elections.
   法律规定所有公民必须在选举中投票。
2. 2. The company's policy is to follow the legal procedures when making a purchase.
   该公司的政策是在购买时遵循合法程序。
3. 3. The contract was legally binding upon both parties.
   合同对双方具有法律约束力。