A September Letter is a letter stating you do not NEED a waiver, and can travel freely. You show it when you travel, but it never needs to be renewed. Its the best case scenario.
-September Letter
-5 year waiver
-(anything less than 5 years)
-Rejection letter.
I see 80% 5 year waivers, 20% something else, mainly 1 year waivers. In the past 3 years, not a single client has gotten 2 consecutive 1's, so generally if you get a 1, if you re-apply you get bumped up to a 5 year waiver.