Originally Posted by
KRviator
. Given they aren't mandating everyone change from the current VH-AAA to VH-AAA/N, rather they are adding an extra 8 possible figures in one column, I think it should be calculated as 26*26*34 - as it doesn't matter where the numeral is inserted, the *34 can be used anywhere in the formula.
But it does matter where the numeral is inserted. VH-2AA is not the same as VH-AA2. So in addition to the existing VH-AAA to VH-ZZZ, you also have 26*26*8 for VH-AA2 to VH-ZZ9, and the same again twice over when you move the numeral into a different position. So 26*26*8*3. As you have pointed out, this is numerically equivalent to 26*26*24, i.e. the same as if CASA were to create a new run of letter-only registrations from VI-AAA to VI-XZZ.