P-9.3, r. 1 - Pesticides Management Code

Full text
43. A person who carries out pesticide spraying must, at the time the work begins, post a sign on each entrance to the treated premises if
(1)  the quantity of pesticides to be applied in the premises is determined by the volume of the premises to be treated; or
(2)  the pesticide label of the pesticide states there must be a waiting period after the pesticide application during which access to the premises is prohibited.
That requirement does not apply to a farmer or forest manager.
O.C. 331-2003, s. 43.