Just thought I would share this little extra nugget--since it isnt in the rules.
If you have to change a number in the book due to jersey replacement from blood, then that is done without penalty (though the rules do not note this exception)
Here is the case play:
Case Book 3.3.7 SITUATION A: “B1 is directed to leave the game because of excessive blood on his/her uniform shirt. Team B’s manager has failed to pack any extra shirts. (a) The coach asks one of the substitutes to give his/her shirt to B1; or (b) Team A is able to find a shirt which B1 can wear even though it is not exactly the same color or style of the Team B shirts. The shirt will however, clearly identify B1 as a member of Team B and will not be confusing to either team or the officials. RULING: Acceptable procedure in both (a) and (b). In both situations the scorer will make necessary changes in the scorebook without penalty. COMMENT: The spirit and intent of the rule is to do everything possible to allow the player to use a different shirt and return without penalty. However, identical numbers shall not be allowed on the same team.”
I had this come up last Friday. Girl has excessive blood and is actively bleeding. I send her to the bench, replacement player shoots her freethrows. She goes to the locker room and gets a different jersey with a new number (30 instead of 24). A few minutes later she comes in during freethrows by the other team. When I bring her in (I'm trail) I go to the scorer and have them change it in the book without penalty. I briefly confer with my partner who agrees with me that we arent penalizing for a changed jersey (despite being in agreement that the rule seems to require it). So I looked and found this case play when I got him from the game to see if we were right or wrong. Looks like we did it right!
Since we are discussing number changes in the book, I thought I would offer this little known exception to the rule that common sense tells us but the rules on their face forget to account for.