Illegal number and penalty question?

[Terrapins Fan]

I had a game at a Christmas ( I mean Holiday, no wait, winter ) tourney, A girl had number 03. Since it was a Christmas ( I mean Holiday, no wait Winter ) Tourney, I passed on the T but I wondered if she got any all year long during the season.

My interpreter followed my game and asked why I didn't call the T. I explain, the following night, he had a player with number on the back, but not on the front. He too passed on the T for the uniform....