I've been racking my brain as to why the Tony committee would consider Cinderella a revival? It never appeared on Broadway before. It also was given a brand new book and they cut and added new songs from the R&H catalogue. To me this constitutes a new musical.
Per Section 2(g) of the Tony Rules and Regulations regarding Eligibility:
Classics.A play or musical that is determined by the Tony Awards Administration Committee (in its sole discretion) to be a “classic” or in the historical or popular repertoire shall not be eligible for an Award in the Best Play or Best Musical category but may be eligible in the appropriate Best Revival category, if any, provided it meets all other eligibility requirements set forth in these Rules.
The Tony Committee defined the show as a "classic". In two years, another show may come along with very similar qualifications as Cinderella, but the Tony committee may see it as a "new" work. The key words in the rules are, "in its sole discretion".
