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When you say "documents to be provided" (i.e. EC approvals, informed consent text...) do you mean in the proposal or during the project running?
Any documentation that you have at the time of submission should be added to the proposal. If you do not have the final informed consent form, you could for example add a draft version. Ethics approval is definitely required before starting related project activities, and need to be submitted to the EC as soon as they are obtained during the project.