I see a few mentions of the BSPA being unable to fund an independent MC.
I'd make two suggestions to change the current set up based on the fact that the individuals involved are making decisions on the interpretation of a rule book.
1. The current PL, EL and NL MCs swap places in matters such as this.
Or...
2. Use a body of former promoters or better still, referees to make decisions on rider eligibility. Considering the low frequency of necessary meetings, the cost wouldn't be prohibitive.
This would reduce the paranoia. Though I do accept some promoters could potentially have an interest in another league.