7Poisoned grain and flesh, &c
If any person—
(a)shall sell, or offer or expose for sale, or give away, or cause or procure any person to sell or offer or expose for sale or give away, or knowingly be a party to the sale or offering or exposing for sale or giving away of any grain or seed which has been rendered poisonous except for bona fide use in agriculture; or
(b)shall knowingly put or place, or cause or procure any person to put or place, or knowingly be a party to the putting or placing, in or upon any land or building any poison, or any fluid or edible matter (not being sown seed or grain) which has been rendered poisonous;
such person shall, upon summary conviction, be liable to a fine not exceeding ten pounds :
Provided that, in any proceedings under paragraph (b) of this section, it shall be a defence that the poison was placed by the accused for the purpose of destroying vermin, where such is found to be necessary in the interests of the public health, agriculture, or the preservation of other animals, domestic or wild, or for the purpose of manuring the land, and that he took all reasonable precautions to prevent access thereto of dogs, cats, fowls, or other domestic animals.