We wish to change the SLA and include a provision for an agency representative to review all your works before it is  sent for uploading on our website.

to review all your works修饰 an agency represnetative做目的状语

介词for这里表示什么意思？

那么for an agency representative to review all your works修饰 a provision 做句子的什么成份呢？

before it is  sent for uploading on our website. 修饰works是看作时间状语吗？