Foreign Principal funds the Discount for the Local Supply

In case where third party fund the discount which is provided to the customers for local supplies of goods, The discount funded amount can be treated as export if in case prinipal is overseas? Overseas principal has place of fixed establishment in UAE but this case is only with overseas Principal. How can we relate with supply is local while funded amount is discount is paid by Overseas Prinipal...

Discount conditions as per reference of Article 28 of ER.