I know only doctors opinions matter, but it's been indicated to me that 24 hrs would be good. Sometimes they just don't want to sign off the chart until they are sure they have everything. Then they have work at the end of the day... Which Should Never Happen.
And it would prevent charts from being lost on their way to the MA to document shots or likewise. (what is the AC way to do that? get out, find patient in list, send message? or forward chart? or, perhaps, point emphatically.)