12. Prohibition or regulation of the disposal of drugs. -If in the opinion of the Chief Commissioner it is necessary or expedient so to do, he may be order in writing-
(a) Prohibit the disposal of any drug except in such circumstances and under such conditions as may be specified in the order;
(b) Direct the sale of any drug to any such dealer or class or dealers and in such quantities as may be specified in the order; and make such further orders as appear to him to be necessary or expedient in connection with any order issued under this section.
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