IF the requisition is linked to the Contract, AND the ICQ attachment is in the contract record, then you do not need to re-attach it on the requisition.
The shopper/requestor will need to include a comment to make the Approver aware. Example: "Navigate to the linked contract to view the ICQ."
It is also recommended that if possible, the ICQ should be a separate attachment in the contract record.
The shopper/requestor should still select 'Yes' in the dropdown on the requisition.