 The Woodworking Machines Regulations 1974, replacing the 1922 Regulations, came into operation on in November 1974.These regulations raised the standard of guarding of the most dangerous machines.Improvements were made to mineworkers' pensions, while the Coal Mines (Respirable Dust) Regulations 1975, which came into operation in October that year, were aimed at reducing the incidence of coal miners' pneumoconiosis.