Could someone verify what happens when the National Capital Region allocation is over? Everyone knows that NCR plates in its current format started out with the letter N (e.g. NAA-111), then it became P**-***, then T**-***, then U, W, X, and now it's down to Z. Assuming that the last Z plate is handed out (theoretically ZZZ-999), what happens to the next batch? Surely the LTO won't use other letters which are already allocated to other regions.

A friend of mine says that the letters/numbers combo will be reversed to numbers/letters (e.g. 111-NAA). Is this true? Can anyone confirm?