in case where the products and localized in Thailand by a manufacturing company designated by seller and approved by buyer Seller mat assign, transfer or delegate to such manufacturing company,any of its rights,interest or obligations under agreement only under the condition that seller causes such manufacturing company to execute the Letter of Participation attached hereto ,seller ensures buyer such manufacturing company's performance of such assigned,transferred and delegated obligations,and buyer approves such assignment,transfer or delegation in writing; provides always that seller shall remain responsible for the performance of any of its obligation under this agreement.