29. All the valves of a tank truck used to transport petroleum products that are connected to the means of containment must be closed, except during unloading. During unloading, valves must be opened by a person who is adequately trained and holds a training certificate in accordance with Division VI of this Regulation, or be under the supervision of such a person.
O.C. 866-2002, s. 29; O.C. 501-2005, s. 10; O.C. 1349-2011, s. 25.