1.15. When the Driver reaches 16 years of age the Junior Race Licence holder is eligible to be issued a Race Club Licence. Upon issue of a Race Club Licence( unrestricted) by the ASN and having competed within Car Racing Events the Driver will no longer be eligible to hold the Junior Race Licence nor to compete within the Junior Racing Formulae.
Motorsport UK 2025 National Competition Rules Version 11
Chapter 12 Appendix 1- Junior Car Racing 394