2.5. Three samples will be taken and must be sealed and labelled in separate ASN approved containers as per Art. 1.2 above and an ASN Sealing Certificate must be completed and distributed as detailed on the Certificate. Prior to sealing, the samples should be wrapped in clean aluminium foil to prevent contact with any plastics.
2.6. Each sample must be a minimum of 1mm width, 25mm length and 0.3mm depth. 2.7. Each sample shall be placed and sealed in an ASN tamper-proof evidence bag.
3. Analysis Testing
3.1. The results of all analysis testing will be compared for compliance with the relevant tyre manufacturer’ s specification for that model retained by the ASN.
3.2. The Entrant is entitled to select one of the samples for their retention( the“ Entrant’ s Sample”) and to nominate a testing laboratory on the list of the United Kingdom Accreditation Service( UKAS) for the independent testing of that sample, if required as per Art. 2.6 above.
3.3. The remaining two samples must be delivered by the organisers to the ASN, normally within 7 days of the Event.
3.4. The ASN will then select one of these two samples at random and arrange testing of the selected sample at a laboratory on the UKAS list, or a laboratory approved by another ASN. The breaking of the seal must be witnessed by a representative of the ASN.
3.5. The result of this ASN first test will be notified pursuant to Art. 5 below.
3.6. If the result of this ASN first test confirms noncompliance then the Entrant may, within 14 days of being notified of this non-compliance, submit the Entrant’ s Sample for testing at the laboratory nominated by them( Art. 1.8 above) and at their expense( Art. 7.1 below). The Entrant must be given the opportunity to be present at this test and the test, including the breaking of the seal( s), must be witnessed by a representative of the ASN.
3.7. If the Entrant does not submit the Entrant’ s Sample for testing within the said 14 days, or if the result of their test confirms non-compliance), the tyre( s) will be deemed ineligible and notification will be given under Art. 5 below.
3.8. If the result of the Entrant’ s test confirms compliance, then the ASN will arrange for the remaining third sample to be tested by a laboratory on the UKAS list not previously used in this particular testing process. The Entrant must be given the opportunity to be present at this test and the test, including the breaking of the seal( s), must be witnessed by a representative of the ASN.
3.9. Where testing takes place under Art. 4.1 below, the result of this third test will conclusively determine the compliance or non-compliance of the tyre( s). Notification will be given in accordance with Art. 5.
4. Comparison Testing
4.1. The results of all comparison testing will be compared for compliance with the results obtained from a sample taken from the same manufacturer and model of tyre, from the same controlled source, at the beginning of the Event.
4.2. Comparison testing will only be implemented where tyres for the Event are mandated by the Organisers for all Competitors in the class( es) to be drawn from a single controlled source.
4.3. One sample, selected at random, will normally be tested on-site by an ASN approved official and in accordance with ASN approved procedures.
4.4. If the result of this test confirms compliance then no further action will be taken.
4.5. If the result of this test confirms non-compliance, the Entrant will be informed and will be given the opportunity to select one of the two remaining sealed samples for testing in their presence.
4.6. If the Entrant chooses not to have a sample tested, or if the result of this second confirms non compliance then the tyres will be deemed ineligible and notification given under Art. 5 below.
Motorsport UK 2025 National Competition Rules Version 11
Chapter 8 Appendix 3- Tyre Testing and Checking 326