186.Adjustment, repair, unjamming, maintenance and apprenticeship: When a worker must access a machine’s danger zone for adjustment, unjamming, maintenance, apprenticeship or repair purposes, including for detecting abnormal operations, and to do so, he must move or remove a protector, or neutralize a protective device, the machine shall only be restarted by means of a manual control or in compliance with a safety procedure specifically provided for allowing such access. This manual control or this procedure shall have the following characteristics:
(1) it causes any other control mode or any other procedure, as the case may be, to become inoperative;
(2) it only allows the operation of the dangerous parts of the machine by a control device requiring continuous action or a two-hand control device;
(3) it only allows the operation of these dangerous parts under enhanced security conditions, for instance, at low speed, under reduced tension, step-by-step or by separate steps.