Krak,
It depends on who is sanctioning your games. Up until last year in SoCal there were contact rules similar to what you describe. Coaches were only allowed contact with players for one hour during the school year outside of the official season. (normally 6th period in school) There was limited, to no contact allowed during the summer. They changed the rule last year so coaches can now be in contact with the players year round. The old rule was silly because the coaches would be in the stands talking to the “official coaches” on the field, who usually were dads or other friends of the coaches. Now the kids have their coaches with them year round and there is much more consistency in approach.
The CIF in So California is the sanctioning body. Information can be found here:
http://www.cifss.org/