3.21.1. Before work begins in a confined space, the principal contractor, together with the employer, specifies in writing:
(a) the tools required for the work;
(b) the equipment installed or to be installed in the confined space and the measures to be taken for its installation, use, maintenance and protection or to move it;
(c) the pipe and conduits entering the confined space;
(d) the hazards, and corresponding safety measures to be taken according to the work;
(e) contaminants which may be found in or around the confined space;
(f) the life saving devices and equipment needed and the corresponding emergency measures.
That information must be available on the job-site.