I guess that is debatable. CBA says they can withhold 3% with MEC notification for OE lines (used to be the OE guys got first crack at the bid package, and the lines they choose get removed from the bid package before we even see it- don't know if that's how it's done now). The other 5% doesn't specify what it has to be used for, or when it has to be withheld. As was mentioned earlier, it is in the "bid package prep" section, so I think it could be argued that it has to be withheld before the package is published, not a trip at a time through out the month.