(1) If a provisional indexed amount is a multiple of $1.00, the provisional indexed amount becomes the indexed amount.
(2) If a provisional indexed amount is not a multiple of $1.00, the indexed amount is the provisional indexed amount rounded up or down to the nearest multiple of $1.00.
(3) If a provisional indexed amount is not a multiple of $1.00 but is a multiple of $0.50, the indexed amount is the provisional indexed amount rounded up to the nearest multiple of $1.00.