3.7. All extinguishers must be adequately protected.
3.8. Their mountings must be able to withstand a deceleration of 25g. Furthermore only quick-release metal fastenings( two minimum) with metal straps are accepted. Anti- torpedo tabs are required. It is prohibited to mount bottles outside the main structure.
3.9. The extinguishers must be easily accessible for the Driver and the Co-Driver.
4. During events:
4.1. All plumbed-in extinguisher systems must be in an‘ ARMED’ condition( i. e. be capable of being operated without the removal of any safety device) at all times whilst competing or Practicing in races or Speed Events( including during post-Event Scrutineering) and at all times that crash helmets are worn on Rallies( i. e. on Stages etc.).
4.2. Any plumbed-in extinguisher system found to be incapable of being operated will be the subject of a report to the Clerk of the Course / Stewards for possible penalty as an offence against Safety Regulations.
4.3. Checking for correctly‘ Armed’ extinguisher systems should only be carried out by ASN Scrutineers and / or Judges of Fact nominated for that purpose.
Motorsport UK 2025 National Competition Rules Version 11
Chapter 7 Appendix 6- Fire Extinguishers and Systems 268