11. She provides leadership for the further implementation of the Convention by 169 Contracting Parties . 12. The contracting parties to the EEA are 3 of the 4 EU member states. 13. The contracting parties do not have the power to make a void contract enforceable. 14. These contracting parties bound themselves to assist each other. 15. The WTO has members, GATT had only contracting parties . 16. There is also a provision for non acceptance of a decision by a Contracting Party . 17. Topfer also called on the US and other non-signatories to become contracting parties to the Convention. 18. The pact's stated intentions were to guarantee the integrity, independence, and sovereignty of the contracting parties . 19. The region could not be transferred to other countries without the consent of the contracting parties . 20. Subject to state statutory requirements, 10 % is the retainage amount most often used by contracting parties .