Such publication shall take place, whenever practicable, 21 days prior to the effective date of the requirement but in all events not later than such effective date.

只要可行，此类公布应在该要求的生效日期前21天做出，但无论如何不得迟于该生效日期。

youdao

Such publication shall take place, whenever practicable, 21 days prior to the effective date of the requirement but in all events not later than such effective date.

只要可行，此类公布应在该要求的生效日期前21天做出，但无论如何不得迟于该生效日期。

youdao