Commissions in the Armed Forces are Presidential appointments that must be confirmed by the Senate. It used to be that the 3 star in charge of personnel could make these appointments and send it to the Senate for its approval. A couple of years ago, it was determined that approval could not be delegated below the level of the Secretary of Defense. Sooooooo, the scroll(the name probably is historical in nature) list must routed up to SecDef. By the instruction, this process takes 12 weeks. If everything is clicking, it can be as short as 4 weeks, and if not longer than 12 weeks. Plan for 12 weeks from the time your name is actually submitted.