1. This Order may be cited as the European Communities (Definition of Treaties) Order 1974. It shall come into operation in respect of each treaty specified in Part I of the Schedule to this Order on the date on which the Order is made. In respect of each treaty specified in Part II of the Schedule to this Order, the Order shall come into operation on the date on which the treaty enters into force for the United Kingdom, which date will be notified in the London, Edinburgh and Belfast Gazettes.