Nogle medlemsstater har indfoert foranstaltninger for tilsyn med fremstilling og markedsfoering af visse stoffer, der hyppigt benyttes ved ulovlig fremstilling af narkotika og psykotrope stoffer; andre medlemsstater er i faerd med at indfoere foranstaltninger af denne type; det er derfor noedvendigt af hensyn til det indre marked at fastlaegge faelles regler paa faellesskabsplan med henblik paa at hindre konkurrencefordrejning i den lovlige handel og sikre ensartet anvendelse af de fastlagte regler;
Whereas some Member States have adopted measures to monitor the manufacture and the placing on the market of certain substances frequently used in the illicit manufacture of narcotic drugs and psychotropic substances; whereas other Member States are about to adopt measures of this kind; whereas it is therefore necessary to establish commun rules at Community level in anticipation of the completed internal market in order to avoid distortion of competition in lawful trading and to ensure uniform application of the rules adopted;