(c) the light thrown on the sources from which the substances are
obtained; or
(d) the methods employed by illicit traffickers.
Copies of the report shall be communicated in accordance with sub- paragraph (b) of article 21.
4. The Parties shall furnish to the Board annual statistical reports in accordance with forms prepared by the Board:
(a) in regard to each substance in Schedules I and II, on quantities manufactured, exported to and imported from each country or region as well as on stocks held by manufacturers;
(b) in regard to each substance in Schedules III and IV, on quantities manufactured, as well as on total quantities exported and imported;
(c) in regard to each substance in Schedules II and III, on quantities
used in the manufacture of exempt preparations; and
(d) in regard to each substance other than a substance in Schedule I, on quantities used for industrial purposes in accordance with sub- paragraph (b) of article 4.
The quantities manufactured which are referred to in sub-paragraphs (a) and (b) of this paragraph do not include the quantities of preparations manufactured.
5. A Party shall furnish the Board, on its request, with supplementary statistical information relating to future periods on the quantities of any individual substance in Schedules III and IV exported to and imported from each country or region. That Party may request that the Board treat as confidential both its request for information and the information given under this paragraph.
6. The Parties shall furnish the information referred to in paragraphs 1 and 4 in such a manner and by such dates as the Commission or the Board may request.
ARTICLE 17
Functions of the Commission
1. The Commission may consider all matters pertaining to the aims of this Convention and to the implementation of its provisions, and may make recommendations relating thereto.
2. The decisions of the Commission provided for in articles 2 and 3 shall be taken by a two-thirds majority of the members of the Commission.
ARTICLE 18
Reports of the Board
1. The Board shall prepare annual reports on its work containing an analysis of the statistical information at its disposal, and, in appropriate cases, an account of the explanations, if any, given by or required of
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