How many warm up pitches?

[TexBlue]

Never had a boss or UIC question it, but I've had several coaches over the years say they've never heard of such a rule. Or the 1 minute in between innings. Or awarding balls or strikes as mandated by the rules.

I keep feeling like I am educating the masses by enforcing the rules. Ahhh, the life and responsibilities of an educator---- uh, umpire.