There shall be a safeguard in place to control access to the point of operation of the machine. The safeguard shall provide sufficient protection for the level of risk.Reference: Selection of Safeguards – CSA Z432-16: Safeguarding of Machinery, Section 5 & 6. Design & Application of Safeguards – CSA Z432-16: Safeguarding of Machinery, Section 9 & 10.