Regular exchange of information between exporting, importing and transit States, and with the International Narcotics Control Board, on exports of precursors before they take place, including, in particular, the provision by exporting States of pre-export notification to the competent authorities in importing countries for all transactions involving the substances in Table I and, in addition to the requirements of article 12, paragraph 10, of the 1988 Convention, acetic anhydride and potassium permanganate upon request to the Secretary-General by the importing country. Recognizing the importance and usefulness of pre-export notifications for combating effectively the illicit production of narcotic drugs, psychotropic substances and, particularly, amphetamine-type stimulants, the same efforts should be made with regard to the remaining substances listed in Table II. These measures should complement tight domestic controls in all countries, which are also necessary to ensure the prevention of diversion of precursor chemicals;