Thanks for the source of the rule, I did not find it in NFHS rules I had. The Ref didn't buy the fact that I had been doing this for years and had brought players off the bench many times. He said he had been doing it for a long time too (although he was about 20 years younger than I). Lesson learned, bring the handbook to the games also. Knowing the rules is not good enough, you have to be able to prove them.