2. The Inter-States Road Transit Declaration shall either be type-written or hand-written, but in the latter case it shall be in ink, legible and in printed characters. 3. The Inter-States Transit Declaration shall bear the undertakings made by the principal obligee and his guarantor. They shall contain leaflets of undertakings and discharge which shall bear the number, type of package, description, quantity gross weight and value of the goods as well as countries of departure of transit and of destination. Article 6 The Inter-States Transit Declaration which is to be completed at the point of departure shall comprise four leaflets numbered from 1 to 4, and be distributed as follows, after registration : Leaflet No 1 : this shall be detached and kept at the office of departure where it is checked against Leaflet No. 3 at the end of transit operations. The booklet is then delivered to the principal obligee or his authorised representative ; Leaflet No 2 : this shall accompany the goods, and shall be deposited at the office of destination where it shall be kept ; Leaflet No 3 : this shall accompany the goods and shall be deposited at the office of destination which shall then return the discharged leaflet directly to the office of departure or give it to the interested party of the representative who shall ensure its return to the office of departure ; Leaflet No 4 : this shall accompany the goods and shall be deposited at the office of destination which shall forward it to the body charged with statistics in the Member State of destination ; Additional leaflets shall be made available to serve as notice of passage. Article 7 Additional documents to the Inter-States Road Transit Declaration shall be regarded as an integral part of it. Article 8 In case there are additional documents to the Inter-States Road Transit System in a Member State of departure to another Customs system, reference shall be made to these additional documents and to any other corresponding documents on the Inter-States Road Transit Declaration. Article 9 1. At the office of departure, as many leaflets of the notice of passage relative to the number of transit offices shall be produced in support of the Inter-States Road Transit Declaration. 2. After registration, the notices of passage are handed back to the principal obligee, or to his authorised representative. Article 10 The Principal obligee shall be bound : 1. to follow the itinerary as specified ; 2. to deliver the goods intact at the office of destination within the prescribed period ;