I have a couple questions about how reserve works.

1. When you receive those email that say you are pre-assigned RAP1 for a future Reserve date, can you still proffer for and be awarded something other than RAP1, or is that saying that you are for sure going to be RAP1 regardless of what you proffer for?

2. What do all of the codes on the N6D mean? i.e., "TL", "ML", "MR", "FLY"?