466. Inspection of guards and protection devices in regard to power presses.

466.     Inspection of guards and protection devices in regard to power presses.

Every employer1 must ensure:

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    (1)     that a power press2 is not used3 after the setting, re-setting or adjustment of its tools, save in trying out its tools or save in die proving, unless:

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      (a)     its every guard and protection device has been inspected and tested while in position on the power press by a person appointed in writing by the employer who is either competent or undergoing training for that purpose and acting under the immediate supervision of a competent person, and who has signed