Originally Posted by LuckyNow

If it's already assigned to you, it's probable that you're the junior man in your reserve grouping. You can look at the N3D and see the far right column. If it says JU, that means 'junior unconfirmed'. You can pass as much as your seniority and group will allow, but if you do early in the month you'll be in a low group at Christmas and find it much harder to pass.