I may be wrong but I don`t think the "inclusion of only one 8pt rider" has been added to the speedway rules and regulations. I can only see any reference to it in the "2026 British Speedway AGM- Statement", which as Redtruck implies, the one over 8 was only a "requirement for INITIAL team building declarations" and therefore, not a rule. Meaning if any 8pt riders were available, after the first match teams could sign 2 or even 3 if they wanted.
2026 British Speedway AGM - Statement - Speedway Hub UK