I thought I had a pretty good understanding of the classifications of the races (Class 3, Open, Listed and Group, etc.), but over the last month or so, there have been some "Restricted" races popping up in Melbourne and Sydney, that I don't recall seeing before. Anyone out there have any clues as to what the minimum or maximum requirements are for horses wanting to enter these races? What is it that's restricted?

I think the 7th race at Rosehill tomorrow is going to be classified at Restricted.