Means of stopping
8.—(1) A Class 2 or Class 3 invalid carriage shall be so constructed and maintained that it meets the requirements set out in paragraphs (2) to (4).
(2) The invalid carriage shall be capable of being brought to rest in all conditions of use with reasonable directional stability and within a reasonable distance.
(3) When the invalid carriage is not being propelled or is left unattended it shall be capable of being held stationary indefinitely in all conditions of use on a gradient of at least 1 in 5.
(4) The requirements of paragraphs (2) and (3) shall not be regarded as met unless the necessary braking effect can be achieved by the appropriate use—
(a)of the invalid carriage’s propulsion unit or transmission gear or of both the propulsion unit and transmission gear;
(b)of a separate system fitted to the vehicle (which may be a system which operates upon the propulsion unit or transmission gear); or
(c)of a combination of the means of achieving a braking effect referred to in sub-paragraphs (a) and (b);
and in the case of paragraph (3) without depending upon any hydraulic or pneumatic device or on the flow of electrical current.