Yes indeed we need to have all document to apply the IL.
You can send all doc by advance , the date of shipment and date of sending doc has to be on the same month .
For example:
- if you planned a shipment on 31/07/2016 and you send me all doc now 05/07/2016 , I can prepare all doc the release now because it’s the same month
- if you planned a shipment on 01/08/2016 and you send me all doc now 05/07/2016 , I have to wait 01/08/2016 to organize the release .
Hope it’s clear , if you have any doubt let us know,