The original idea was to allow live-action movies that were adaptations of the game, and the game is the source. That was apparently expanded to anime to allow the same when anime was source material, but it was impossible in many cases I guess because the real source material is manga/novel. Then if the first screen adaptation was anime and live-action movie followed, that was ok too it seems, e.g. this
http://vgmdb.net/album/43435
the road there was novel -> Miyazaki's anime (first screen adaptation) -> then this live-action thing.
Itazura is manga -> TV drama plus several non-jp drama versions -> only after it was anime -> then this another TV drama.
Is that really the same as the original idea?
I mean, many relatively frequent submitters didn't know (and some maybe still don't) that live-action movies that are adaptations of games as the source material are allowed...