exports , other than a concentration attributable to normal cooperation and with a desire to reconcile the differencesseasonal factors , of particular products in any one category between them . ---pagebreak--- N ? L 388 / 8 Jornal Oficial das Comunidades Europeias 31 . 12 . 86 Article 16 3. Either Party may at any time propose modifications to this Agreement .This Agreement shall apply , to the territories within whichthe Treaty establishing the European Economic Community 4. Either Party may at any time denounce this Agreementis applied and under the conditions laid down in that Treaty , provided that at least 90 days' notice is given . In that eventon the one hand , and to the territory of Hong Kong on the the Agreement shall come to an end on the expiry of theother hand . period of notice . 5. The Annexes and Protocols to this Agreement and the Article 1 7 Declarations and Exchanges of Letters accompanying it shall form an integral part thereof.1. This Agreement shall enter into force on the first day ofthe month following the date on which the ContractingParties notify each other of the completion of the proceduresnecessary for this purpose . It shall be applicable until 31 Article 18December 1986 . This Agreement shall be drawn up in two copies in the2. This Agreement shall apply with effect from 1 January Danish , Dutch , English , French , German , Greek and Italian1983 . languages , each of these texts being equally authentic .