Whistle for a sub?

[Smitty]

I never blew the whistle for subs till I moved to Dallas, where they require it. Now that I'm used to it, I do it all the time. I moved to another association nearby where they don't require it, but I am still doing it. I don't like blowing the whistle more than necessary, but I like it even less when I have to blow my whistle because my partner didn't look to see my hand raised while I was bringing in subs and he's handing the ball for a throw in.

As far as reporting mechanics, I think when working high school ball you should use high school mechanics.