I'll grant you Peter, that there's been no consistent process applied but that's largely (over years, not just recently) the result of people either ignoring or changing the rules to suit immediate agenda - that's "expedience."
There was a time when, broadly speaking, the philosophy SEEMED TO BE that regional status served as an incubator of sorts, to test whether classes had what it took to "go national." That's the reason the "regional forever" clause was included in the original IT rule set: It would otherwise have been presumed that those classes would be considered for national status if they met the participation requirements. And someone didn't want that to happen.
It would be interesting to search back through past GCRs to see when/how the language around "National Status" has changed. In the 2008 book it says...
C. Based on member input, a Regional Class meeting or exceeding the participation requirements outlined in paragraph 9.1.12.A. for one (1) year may be considered for inclusion in the National Championship racing program, except Improved Touring
That's kind of how I remember it being. Subsection D is where the silliness begins, including the clause that allows for "manufacturer input." So, "based on member input" (how many again?), the board OK'd the prepared classes. I'd venture that far more than that many members have come out in support of IT gaining national status, but it hasn't.
That's politics, just like the way a coal executive can ask favors of the Governor of WV, that I'd never even get a chance to present...
K