(1) These Regulations may be cited as The Locomotives etc. Regulations 1906 (Metrication) Regulations 1981 and shall come into operation on 1st November 1981.
(2) In these Regulations, “ the principal Regulations ” mean the Regulations amended by these Regulations that is to say— The Locomotives and Waggons (Used on Lines and Sidings) Regulations 1906.