This Agreement shall bind and inure to the benefit of the Parties hereto and their respective successors and legal representatives and permitted assigns. No Party shall assign its rights and obligations under this Agreement, without the prior written consent of the other Parties hereto, and any such assignment contrary to the terms hereof shall be null and void and of no force and effect; provided , however , that WST Seller and/or RETA Seller may collaterally assign, without the consent of Buyer, this Agreement or all or a portion of its rights, interests and obligations under this Agreement to Persons providing debt financing in connection with the Project.