(2) In any prosecution of any trader for the contravention of the provisions of subsection (1), it shall be a sufficient defence for the accused to prove-
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| (a) that on the occasion in question he supplied a reasonable quantity of the article, or had not a sufficient quantity in his possession to supply the quantity ; or | | |
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| (b) that he carried on business in the article as a whole sale trader only, and that the sale of the quantity demanded by the buyer would have been contrary to the normal practice of a wholesale business; or | | |
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| (c) that the sale of the article on that occasion in question would have been contrary to any provisions of any written law or any general or special direction issued to him under section 6. | | |
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