A few timing questions

[voiceoflg]

Hello all,

I'm not a referee. I do play-by-play for a high school in Georgia. But I'm glad I found this forum so I can better learn the rules. Coaches and fans aren't the only ones who think they know the rules when they don't.

I'm hoping to make the football broadcasts more organized, and I'd love to get your help. Is there a set time limit for the following:

change of possession? It seems punts take a little longer than interceptions/fumbles from the time the play is blown dead to the first snap of the new series.

charged timeouts?

between 1st/2nd and 3rd/4th quarters?

between end of regulation and overtime?

between overtime periods?

I'm trying to figure a way to get the commercials in without asking the referee to make the game last as long as a televised SEC game, which I'm sure none of us want.

Thanks.