1 Citation, commencement and interpretation
1 These Regulations may be cited as The Health and Safety (Foundries etc.) (Metrication) Regulations 1981 and shall come into operation on 1st December 1981.
2 In these Regulations, unless the context otherwise requires, “the principal Regulations” mean the Regulations to be amended by these Regulations, that is to say—
The Blasting (Castings and Other Articles) Special Regulations 1949;
The Iron and Steel Foundries Regulations 1953;
The Non-Ferrous Metals (Melting and Founding) Regulations 1962.
, to which there are amendments not relevant to these Regulations.

2 Amendment to the principal Regulations to substitute metric measurements for imperial measurements
The provisions of the principal Regulations specified in the Schedule to these Regulations in column 1 shall be amended by substituting for the measurements set out opposite thereto in column 3 the measurements set out in the corresponding entry in column 4.

3 Application to existing premises and plant or premises and plant under construction
Where any premises or plant in existence or under construction immediately before the coming into operation of these Regulations complied with the requirements of the principal Regulations as then in force, those premises or that plant shall be deemed to comply with the principal Regulations as amended by these Regulations.
Signed by order of the Secretary of State.
David Waddington Joint Parliamentary-Under Secretary of State Department of Employment 14th September 1981