4.—(1) Subject to paragraph (2), these Regulations do not apply to an automatic rail-weighbridge—
(a)which comprises an automatic weighing machine for the purposes of the Weights and Measures Regulations 1963; and
(b)which has been first passed as fit for use for trade, for the purposes of those Regulations, within a period of 10 years from the date on which these Regulations came into force.
(2) The exception provided in paragraph (1) does not apply in the case of an automatic rail-weighbridge which bears the marking “R 106”.