3.5.7. Step-ladder: If the worker uses a step-ladder the employer shall make sure:(a) that it complies with CAN3-Z11-M81 Portable Ladders, except to the extent that the standard is modified by this subdivision;
(b) that it is not used near an exposed electrical circuit when it is made of metal or is metal-reinforced;
(c) that its legs are fully spread and that the retaining device is locked; and
(d) that the top and the rest are not used as a step.