限制在这条河上捕鱼的新法规现已生效。

New regulations limiting fishing on this river are now ___in ___force.

如果规则没有被正式颁布，它可能不会生效。

If a rule is not officially enacted, it may not be ___in ___force.

公司关于远程办公的新政策将从一月起生效。

The company's new policy on remote work will be ___in ___force from January.