3. The following new section is hereby inserted immediately alter section 29 of the principal enactment and shall have effect as section 29A of that enactment :-
29A. In any prosecution for an offence referred to in section 27 it shall be presumed, unless the contrary is proved, that such poisonous, explosive or stupefying substance (including dynamite) or other noxious or harmful material or substance was used, carried or possessed for any of the purposes referred to in section 27." . |
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