自签发之日起30天有效的翻译：Since the issuance of 30 days from the date of effective 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

From the date of issue valid for 30 days

Since the issuance of 30 days from the date of effective

Date of 30 day effectiveness from signing and issuing

30 days from the date of issuance effective

Since the issuance of 30 days from the date of effective