Hi folks. By way of introduction, I'm making a return to officiating (local Parks & Rec, SP) after a 19-year absence. A lot has changed ... and it seems I've forgotten more than I ever knew. This could make for a very long season :(

I was handed an ASA 2005 Rule Book, to which I'm supposed to conform, and see a phrase used in a few crucial places: "Dead ball line is considered in play" (example: Rule 1, "DEAD BALL" definition, C).

Can anybody interpret that for me? "Dead ball line" is defined nowhere. Does this mean the line separating foul territory from the out-of-play zone?

Thanks in advance!

Some fields don't have fences, etc., so they use chalk lines. If a ball goes outside these
lines, then you have a ball that has entered dead ball terrioity. A fielder may not be
outside these lines when making a catch on a batter fly ball.

Thanks, Glen. That clears it up!