2023 regulations
The 2023 regs are under construction. They will look a lot like the 2022 ones, which you can find here:
Sporting regulations:
2022 NKHTGT Sporting Regulations V1.1GRC BSA v2-approved
Technical regulations:
Next races
The 2023 race schedule has been finalized, check here: https://www.nkhtgt.nl/en/2022/11/14/nkhtgt-announces-2023-calendar/