11.13. It is mandatory for an operational FIA Impact Data Recorder( IDR) to be fitted to all Vehicles competing in British, National status and Junior Championships. IDRs must be installed as per and operated in accordance with the manufacturers’ instructions. Each IDR must be uniquely assigned to, and used only in, the individual Vehicle in which it is installed.
Motorsport UK National Competition Rules 2026 Edition 5
Chapter 22 Appendix 12 – Race( Chapter 12) 819