I would assume it would be under regulation
010.1.2 Completion of Fixtures
It is the duty of the staging Promotion to ensure that all fixtures are completed and in the event of it being necessary to re-arrange a team fixture, the Promoter(s)/Associate(s) shall mutually agree a re-staging date. Should they fail to agree the sole authority to specify a date and/or venue for the re-staging shall lie with the BSP LTD Directors.
In all events that count towards an Official British Speedway Competition the Regulations must be adhered to and any team or individual found in breach of the Regulations, will be liable to a penalty including the loss of league points or removal from a competition.
Would agree 100%