If there's one thing consistent about the Tonys' Best Score category, it's been seemingly inconsistent (or evolving) through the years.
Nowadays, the rule of thumb seems to be that a score needs to be at least 50% original to qualify. But it hasn't always been that way.
* 1974: ''Gigi'' qualified (and won the Tony) because the stage adaptation included 5 new songs by Lerner and Loewe.
* 1993: ''Tommy'' and ''Kiss of the Spider Woman'' tied for Best Score. (But how much new music did ''Tommy'' have?)
* 1996: The Tonys allowed 4 trunk songs by Rodgers & Hammerstein, then interpolated into ''State Fair,'' to compete for Best Score.
* 2003: The Tonys initially rejected ''Urban Cowboy'' for not having enough original songs written for the show, but reversed itself after it was proven otherwise. And oddly, the Tonys ruled that the show's pre-existing country hits (by Clint Black, Charlie Daniels, etc.) also were Tony-eligible.