I do not know where or if it is written in our contract, but here is how it was explained to me by a futures scheduler. During the bid processing for Jan, you were sent a notification that you have vacation in Feb (2 months early). If you wanted you could have slid the vacation back to the first part of the month, but once you are awarded c/o into Feb, it is too late to affect that c/o because it is part of your jan bid month. So, if you want to knock out c/o, you must do it before you get it. Got it?