The extension of rights conferred by parallel or equivalent agreements or arrangements or equivalent decisions between one of the Contracting Parties and third countries shall be recognised and respected by all Parties. The conditions for such participation shall be the subject of an agreement between the Contracting Parties and the requesting State. This Convention shall be subject to ratification or approval by all Contracting Parties in accordance with their own procedures. the agreement is not such as to give the undertakings concerned the power to determine the prices of a substantial part of the products concerned in the area covered by the agreement, to control or restrict production or marketing or to protect them against effective competition from other undertakings in the territory covered by the agreement. PROTOCOL No 12 on conformity assessment agreements concluded with third countries, agreements or categories of agreements between undertakings; Before concluding an agreement with a third country in the territory covered by this Chapter, the Parties shall consult each other in order to ensure compatibility with the provisions of this Chapter, in particular where this Agreement contains provisions derogating from the customs security measures referred to in this Chapter. Each Party shall ensure that agreements concluded with third countries do not create rights and obligations for another Party, unless decided by the EEA Joint Committee. Without prejudice to Article 11, those agreements shall not affect Community provisions on the communication of information between the competent services of the European Commission and the customs authorities of the Member States concerning all information obtained in the customs field which may be of Community interest. Without prejudice to the special provisions of the Agreements between the European Economic Community and the EFTA States, this Protocol shall apply to controls and formalities relating to the carriage of goods which must cross a frontier between an EFTA State and the Community and between the EFTA States. . .