Regulation 19(4A): inserted, on 29 August 1975, by regulation 2(3) of the Housing Improvement Regulations 1947, Amendment No 3 (SR 1975/218).
Regulation 19(5): amended, on 24 April 1975, by regulation 2(h) of the Housing Improvement Regulations 1947, Amendment No 2 (SR 1975/83).