Where is this in the umpire manual?

[NCASAUmp]

Originally Posted by NYBLUE

I've carried my cell into games in the past for the sole purpose of keeping time on the game. If the game isn't being played under a time limit of any kind, the phone stays in the equip. bag. ALWAYS.

The only times I'd ever carry a phone onto the field are if A) I'm it - there's no field supervisor or scorekeeper to call 911 (and in the case of some injuries, every second counts) or B) Oops, I forgot. In the case of B, I try to find a good time to put it into my bag, or I turn it completely off and keep it in my ball bag.

Then again, my phone isn't exactly cheap, and I don't have insurance on it with my carrier. All efforts are made to keep it off the field.

If you're expected to keep the official time, my advice is to put a cheap watch in your pocket or ball bag. A $5 watch is cheaper than any cell phone out there, and is a heck of a lot easier to replace.