Since I wont be working that game for a number of years
I'll answer in response as if this happened at a boys or girls JV game. Plus, that might spur discussion of whether or not the level of the game changes the answer.
It appears that the rule book contemplates that 0 and 00 are allowable but that no team may have both.
The question becomes: is the reason for "no 0 and 00" because the rules contemplate them as the same number?
If so, then there is no T since 0 and 00 are the same number.
If not, then the rules view them as different numbers and the player is not wearing a proper number as reflected in the book and its a T.
My problem is that while, like NR, I know that you cant have a 0 and 00 on the same team, off the top of my head I dont remember where that rule is or what the reasoning for it is.
SO...because I dont have full knowledge of the reason for the rule, I would NOT have called the T so long as there was not also a number 0 and would have treated 0 and 00 as the same number.
But that said, had I believed the rule was that 0 and 00 were seperate numbers I would have given the T and started the game with 2 shots and a throw in. Some say ignore that cheesy stuff. But on the other hand, one team did it right and the other team didnt. How about rewarding the team that managed to follow the rules. Now I cant wait to hear what people with actual experience (unlike me) would do. This is very helpful to my development.
Now I am going to bust out the rule book and find that 0/00 rule...
Clark