Where that technique is used:(1) a worker at a working face or wall shall be protected against falls by a fall-arresting device, which shall:(a) be independent of the rappelling system;
(b) be a Type 1, Class A self-retracting life line complying with CAN/CSA Standard Z259.2.2, Self-retracting devices, or fall arrester and comply with CSA Standard Z259.2.5, Fall-arresting devices and vertical lifelines, or CSA Standard Z259.2.4, Fall arresters and vertical rigid rails;
(c) be connected to the fall arrest attachment ring which identified for fall arrest on the safety harness;
(2) the life line shall:(a) comply with CSA Standard Z259.2.5, Fall-arresting devices and vertical lifelines, or CSA Standard Z259.2.4, Fall arresters and vertical rigid rails;
(b) be of a diameter and construction in accordance with the recommendations of the manufacturer of the fall-arresting device;
(c) be less than 90 m (300 ft) in length;
(3) the rope of the rappelling system shall:(a) be made of synthetic fibre;
(b) have a breaking strength of at least 40 kN (9,000 lb);
(c) be long enough to reach a safe landing;
(d) not be extended by attaching other ropes;
(e) be less than 90 m (300 ft) in length;
(4) the rope of the rappelling system or life line shall be fixed to 2 anchors each having a breaking strength of at least 18 kN (4,000 lb). The anchors for the rope of the rappelling system shall be independent of the anchors of the life line;
(5) except where protected by a sheath, the rope of a rappelling system or life line shall never come into contact with any sharp edge;
(6) the carabiners, lowering devices and other rappelling hardware shall be made from drop-forged steel or a material of equivalent quality and shall have a breaking strength of at least 22 kN (5,000 lb);
(7) a worker shall use a safety harness complying with the CAN/CSA Standard Z259.10, Full body harnesses;
(8) no person shall descend a working face or wall where wind velocity is greater than 50 km/h (31 mph);
(9) no person shall be at the working face or wall during a thunderstorm or heavy rain;
(10) following a thunderstorm or heavy rain, a worker shall wait at least 1 hour before descending a working face or wall;
(11) a means for emergency evacuation shall:(a) be available to workers at a working face or wall;
(b) be independent of the rappelling system and the fall-arresting device;
(c) allow for fast and safe evacuation of a worker in difficulty on a working face or wall;
(12) all damaged material connected with the use of the rappelling technique shall be discarded;
(13) as long as a worker is at a working face or wall, a person having been trained in the rappelling technique shall be present beyond the working face or wall and shall be located in such a way as to see the worker and be able to watch over him and communicate with him. Where he is unable to communicate by speaking directly to the worker, a radiotelephone communication system shall be used;
(14) no worker shall use the rappelling technique to access a working face or wall unless he has the skills, knowledge and training required for the working method developed by his employer, in accordance with paragraph 3 of section 78 of the Act respecting occupational health and safety (chapter S-2.1).