(1) to use a portable ladder or a stepladder near an exposed electrical circuit, if it is made of metal or is metal-reinforced;
(2) to use a portable ladder or a stepladder as a horizontal support;
(3) to stand up on
(a) the last 2 rungs of a portable ladder;
(b) the top rung, on the pail shelf, on the rear section or on the top of a stepladder, except if it was so designed by the manufacturer;
(4) to use the intermediate or upper section of a multiple-section ladder or of an extension ladder as the lower section, unless such use is authorized by the manufacturer.
O.C. 885-2001, s. 29; 502-2018O.C. 502-2018, s. 61.