Position of outfielders - ASA

[ToledoCYOBlue]

ASA, Adult co-ed slow pitch.

Is there a rule that says the outfielders must position themselves a certain distance behind the infielders? In a recent game, the BU actually called time before a pitch to move our outfielders back (they were starting 20-25' behind the baseline). He said that they must be at least 40' beyond the baseline. When questioned whether this was an ASA standard rule, or a local rule, he stated it was ASA. Does this rule actually exist?

Thanks,
Charlie