也就是说，从修改的那一天起，只有环境署秘书处签发的指引才是法律上有效的。

Namely, from the date of revision, only notices signed by the Secretary for the Environment are legally effective.

youdao

也就是说，从修改的那一天起，只有环境署秘书处签发的指引才是法律上有效的。

Namely, from the date of revision, only notices signed by the Secretary for the Environment are legally effective.

youdao