Section R. 408.12646 - Powered clamping deviceRule 2646. An operator of a powered clamping device that is used for holding a workpiece shall be protected by employing 1 of the following methods:
(a) Guarding or adjusting so that the opening between the clamp and workpiece insertion is not more than 1/4 of an inch.(b) Two-hand controls furnished to, and used by, each operator.(c) Providing a single control for each operator if the operator is remote from the point of operation or pinch point.(d) A means which would prevent the clamping device from closing while the employee is in the point of operation or pinch point.Mich. Admin. Code R. 408.12646