P-42, r. 10.1 - Regulation respecting the safety and welfare of cats and dogs
25. A restraint such as a chain or a rope that is used to attach an animal outdoors must
(1) not be liable to get stuck or shortened, in particular by wrapping itself around an object;
(2) not cause discomfort for the animal, in particular because of its weight;
(3) allow the animal to move about freely and safely; and
(4) allow the animal to reach its food and water.