For operations subject to the obligation of a simplified general health and safety coordination plan as provided for in articles R. 4532-52 and R. 4532-54, each contractor called upon to carry out work presenting particular risks included in the list of works provided for in article L. 4532-8 shall draw up a simplified specific health and safety plan in writing before starting or continuing the work. The plan assesses these risks and describes the instructions to be observed or given to workers called upon to work on the site and the health and safety conditions under which the work will be carried out.