这个新规则从下周开始生效。

The new regulation will become ___operative starting next week.

医生正在讨论手术的详细步骤。

The doctors are discussing the ___operative procedure in detail.

那名特工成功地获取了敌方的重要情报。

The secret ___operative successfully obtained crucial intelligence from the enemy.

在这个项目中，时间是最关键的因素。

Time is the ___operative factor in this project.