19.—(1) Where a pipe, syringe, utensil, apparatus or other article intended for the smoking, administration or consumption of a controlled drug is found in any place or premises, it is presumed, until the contrary is proved, that the place or premises is used for the purpose of smoking, administering or consuming a controlled drug.
(2) Any person found in or escaping from any place or premises which is proved or presumed to be used for the purpose of smoking or administering a controlled drug is presumed, until the contrary is proved, to have been smoking or administering a controlled drug in that place or premises.