a) operated by a carrier licensed under the provisions of Article 4 of this Annex; b) performed under the conditions set out in Article 5 of this Annex by means of transport approved by the Customs office of commencement and issue with certificates which shall be in the form set up in Appendix 3 of this Annex; c) guaranteed by a surety in accordance with the provisions of Article 6 of this Annex; and d) undertake under cover of the SRCTD, or any other transit document approved by CMT. 3. The provisions of this Annex shall apply to transit goods being carried by whatever means of transport, except that in the case of air, water and rail transport, the aircraft, vessel or train in transit shall be exempted from the application of the provisions of this Annex. However, the aircraft, vessel or train will be subject to the national laws and regulations af the transit country. 4. The provisions of this Annex shall cease to apply to transit traffic referred to in Article 2 (1) (a) of this Annex when the import duties have been eliminated. ARTICLE 4 LICENSING OF TRANSISTORS AND CARRIERS 1. Any person intending to be engaged in the operation of transit traffic under the provisions of this Annex shall be licensed for that purpose by the competent authorities of the Member State in whose territory he is normally resident or established, and the competent authority shall inform all the other Member States of all the persons so licensed. 2. The conditions for the issuance of the licences referred to in paragraph 1 of this Article to