The London-South Wales Motorway (M4) (Coryton, Cardiff) (Speed Limit) Regulations 1980
The Secretary of State for Wales in exercise of the powers conferred upon him by section 13 of the Road Traffic Regulations Act 1967(a) and of all other enabling powers and after consultation with representative organisations in accordance with the provisions of section 107(2) of the said Act of 1967 hereby makes the following Regulations:—

(a) 1967 c. 76; Section 13 was amended by the Transport Act 1968 (c. 73) Part IX and the Criminal Law Act 1977 (c. 45) Schedule 6.