17.—(1) The employer shall ensure that, where appropriate, work equipment is provided with one or more controls for the purpose of—
(a)starting the work equipment (including re-starting after a stoppage for any reason); or
(b)controlling any change in the speed, pressure or other operating conditions of the work equipment where such conditions after the change result in risk to health and safety which is greater than, or of a different nature from, such risk before the change.
(2) Subject to paragraph (3), the employer shall ensure that, where a control is required by paragraph (1), it shall not be possible to perform any operation mentioned in sub-paragraph (a) or (b) of that paragraph, except by deliberate action on such control.
(3) Paragraph (1) shall not apply to re-starting or changing operating conditions as a result of the normal operating cycle of an automatic device.