297.1. Layout of a confined space: In the case of a new confined space or the renovation of an existing confined space, its layout must integrate equipment and installations that make it possible to intervene from the outside. In addition, the corresponding work methods, taking into account the risks around the confined space, must be developed and be available on the work site before the confined space is put into service.
Where it is impossible, in the cases provided for in the first paragraph, to integrate equipment and installations that make it possible to intervene from the outside, the layout of the confined space must allow for the efficient control of the risks identified according to the gathering of information prescribed in section 300. In addition, that layout must in particular integrate equipment and installations that make it possible to(1) control the atmospheric risks, the risk of being buried or the risk of drowning;
(2) facilitate entry and exit, movements inside, as well as rescue;
(3) control access to the confined space and prevent falls;
(4) control the other risks that could compromise the health or safety of a worker.
43-2023O.C. 43-2023, s. 31.