Articles 97s and 97t shall also apply between the countries of the same regional group for the purposes of provision of information to the Commission or to the customs authorities of the Member States and of the subsequent verification of certificates of origin Form A or invoice declarations issued in accordance with the rules on regional cumulation of origin.

For the purpose of Articles 85, 97m and 97p, the agreement concluded between the European Union, Norway, Switzerland and Turkey shall include inter alia an undertaking to provide each other with the necessary support in matters of administrative cooperation.

For the purpose of Articles 86(7) and (8) and 97k, the country with which the European Union has concluded a free-trade agreement in force and which has agreed to be involved in extended cumulation with a beneficiary country shall also agree to provide the latter with its support in matters of administrative cooperation in the same way as it would provide such support to the customs authorities of the Member States in accordance with the relevant provisions of the free-trade agreement concerned.