User blog comment:CreatorTheta/Only 48 People can Pass Beacons initiation/@comment-23784953-20130917063554

Eh. They're most likely the first batch. However, given that the relics used are chess pieces, it's not hard to say that Ozpin used genuine chess pieces. As such.

There's only one queen and one king and eight pawns per chessboard.

But considering the likelihood that pawns will not be used since they're far too generic to distinguish from each other, then there's only 32 people able to pass.