(3)Article 12 of the United Nations Convention envisages adoption of appropriate measures to monitor the manufacture and distribution of precursors. This requires the adoption of measures relating to the trade in precursors among Member States. Such measures were introduced by Council Directive 92/109/EEC of 14 December 1992 on the manufacture and the placing on the market of certain substances used in the illicit manufacture of narcotic drugs and psychotropic substances(6). To better ensure that harmonised rules are applied at the same time in all Member States, a regulation is considered to be more adequate than the current Directive.