Originally Posted by madeinUSA

The vacancy is posted. You fill out your preferences in order CA or FO and what base. Save the email in case something gets messed up (which you can withdraw from any voluntary move between the initial award and the final award). When the Final award is posted it will give your class/move date. Lately there has been a new vacancy every 3 months on average. So if you are starting in June you will probably be able to bid again in July or August with a move date of September or October. Hope that helps!