s 17 Construction and sale of new machinery.
(1) In the case of any machine in a factory being a machine intended to be driven by mechanical power— (a) every set-screw, bolt or key on any revolving shaft, spindle, wheel or pinion shall be so sunk, encased or otherwise effectively guarded as to prevent danger; and (b) all spur and other toothed or friction gearing, which does not require frequent adjustment while in motion, shall be completely encased unless it is so situated as to be as safe as it would be if completely encased. (2) Any person who sells or lets on hire, or as agent of the seller or hirer causes or procures to be sold or let on hire, for use in a factory in the United Kingdom any machine intended to be driven by mechanical power which does not comply with the requirements of this section shall be guilty of an offence and liable to a fine not exceeding one hundred pounds. (3) The Secretary of State may by regulations extend the provisions of the last preceding subsection to machinery or plant which does not comply with such requirements of this Act or of any regulation made thereunder as may be specified in the regulations, and any regulations made under this subsection may relate to machinery or plant in a specified process. (4) Nothing in this section shall apply to any machine constructed before the passing of this Act, and regulations under this section shall not apply to any machinery or plant constructed before the making of the regulations.