Timing and penalty enforcement help.

[MD Longhorn]

Goodness.

Yes, there's a handy reference for this - it's the rulebook.

Seriously though ... sounds like someone's putting you in a position to fail. When we had people who wanted to referee, we'd work on it in JV or JH games - with them as umpire. He would signal to R whether he thought the clock would start on the ready or on the snap on every play. When he began to get it right 100% of the time, he's whitehat a JV or JH game himself, with an experienced R at U to tell him if he flubbed it...

And as umpire, you should know all the penalty enforcements - long before you think about R.