Regulation 15(1): amended, on 19 January 1994, by regulation 2(1) of the Lead Process Regulations 1950, Amendment No 4 (SR 1993/410).
Regulation 15(1)(a): replaced, on 19 January 1994, by regulation 2(2) of the Lead Process Regulations 1950, Amendment No 4 (SR 1993/410).
Regulation 15(1)(b): revoked, on 19 January 1994, by regulation 2(2) of the Lead Process Regulations 1950, Amendment No 4 (SR 1993/410).
Regulation 15(2): revoked, on 19 January 1994, by regulation 2(3) of the Lead Process Regulations 1950, Amendment No 4 (SR 1993/410).
Regulation 15(3): revoked, on 19 January 1994, by regulation 2(3) of the Lead Process Regulations 1950, Amendment No 4 (SR 1993/410).