4.Amendment to regulation 20 (braking systems of certain vehicles first used on or after 1st April 1983)
5.Amendment to regulation 21 (braking systems of vehicles to which regulation 20 does not apply)
6.Amendment to regulation 22 (vacuum or pressure brake warning devices)
7.Amendment to regulation 23 (couplings on trailer pneumatic braking systems)
8.Amendment to regulation 24 (maintenance and efficiency of brakes)
9.Amendment to regulation 74A (emission of smoke, vapour, gases, oily substances etc. – further requirements for certain motor vehicles first used on or after 28th February 2003)
10.Amendment to Schedule 1 (Community Directives and ECE Regulations)