CSubject to conditions hereunder, and where qualifications of the Pre-Buyer is material subject matters hereof, if the Pre-Buyer is desirous of assigning its contractual rights to any third parties, doing so is required to be approved in writing from the Pre-Seller, and whereby the Pre-Buyer is hereby required to be solely responsible for payments of assignment-related documentation amendment to the Pre-Seller at the rate of THB 5,000 (Five Thousand Thai Baht only) each occasion.