This standard was originally made under section 7 of the Motor Vehicle Standards Act 1989 and from 1 July 2021 continues in force as if it were a national road vehicle standard determined under section 12 of the Road Vehicle Standards Act 2018 (see Schedule 3, Part 2, item 2 of the Road Vehicle Standards (Consequential and Transitional Provisions) Act 2018).

This standard repeals each vehicle standard with the name Australian Design Rule 38/01 — Trailer Brake Systems that is: (a) made under section 7 of the Motor Vehicle Standards Act 1989; and (b) in force at the commencement of this standard. This standard also repeals each instrument made under section 7 of the Motor Vehicle Standards Act 1989 that creates a vehicle standard with the name Australian Design Rule 38/01 — Trailer Brake