Carl, MSNZ is too willingly to effect change and impose cost on competitors for the sole purpose of compliance with FIA and uniformity. Neither is a valid enough reason for change.

Many cars are permitted to compete in NZ motorsport by virtue of 'grandfather clauses' which tells us that the standards to which they comply are both adequate and acceptable. The sport has no business disallowing any other competitor to comply with the same standards.

Rather than needless regulation change, a simple advisory that our previous main hoop specs rendered those cars ineligible for overseas competition would have sufficed.

However, leaving that aside for a moment, if I recall correctly, the rule change had a well publicised lead time of around 18 months so it's perhaps a little misleading for those who didn't get their stuff together to claim to have been "caught out".

One would hope that the situation is not irretrievable and that a well presented case to the Exec. might bring a solution. Failing that, a remit at conference.
But there would need to be some legwork first to understand the extent of the issue. Perhaps a register of those competitors and cars effected.