duration of validity meaning in English

有效期间
有效时间

The ministry of commerce , within 30 days after receipt of all the above - mentioned documents , shall give the official reply , the duration of validity of which is 180 days
商务部收到上述全部文件后应在30日内作出原则批复，原则批复有效期180日。
Article 13 ： the duration of validity of the exploration and survey permit or the mining permit upon the transfer of the mineral exploration right or mining right shall be the remaining time period of the duration of validity of the original mineral exploration permit or mining permit minus the year ( s ) during which exploration or mining has already been conducted
第十三条：探矿权、采矿权转让后，勘查许可证、采矿许可证的有效期限，为原勘查许可证、采矿许可证的有效期减去已经进行勘查、采矿的年限的剩余期限。
The duration of validity for the approved speedy immigration inspection and clearance of foreign businesspeople shall be one year from the day the data is sent to the immigration office to be filed ; an expired speedy immigration inspection and clearance shall not be extended . instead , a recommendation shall be proposed anew for a new examination and approval
四、外籍商务人士获准快速查验通关之效期，自经济部传送境管局建档之日起为一年；到期应经重新审查及推荐，不得延期。