Warm-up time limits on field for each team

[Bluefoot]

Customarily, for amost NFHS teams here, the home team does not take infield-outfield warmups until the visiting team bus arrives. Then the home team does for about 10 minutes, give or take a couple. Then the visitors take their turn.

Most of the time, there is no problem. But sometimes the visitors' arrival is delayed for a number of reasons, and they don't show up until less than 15 minutes before game time. The home team still waits for the visitors to show up, then the home team takes their 10 minutes on the field. Then the visitors start infield with only a couple of minutes before game time. Some blues have made teams cut this warmup short and start the game very near the original start time. Some blues give teams as much time as needed for a proper warmup. Different blues, different boards, different attitudes. IMO, this problem would be pretty much solved if home teams start their IF/OF warm up no later than 20 minutes before scheduled game time, regardless if the visitors are there or not at that time.

One veteran blue told me that somewhere (we looked in ASA and NFHS 2007 rules books), but we could not find it, maybe it's an old case book - he remembers a rule that states teams each get 8 minutes of "field time" for their warmup. Has anyone ever heard of this?

I asked my assignor, and the only time limit of this type he's ever heard of is for our Connecticut HS tournament games - a 5 minute limit for infield/outfield. But no limit for regular season games.

Anybody know anything more than this?