Why?

Reserve doesn't change and Regular pilots should be protected by the change to total known absence hours.

C PBS Staffing Formula

1. Formulae values for the bid period at issue:
A = scheduled block and credit hours for such position
B = total known absence hours for such position, where known absence hours = # of projected vacation days of known absence in such position x (ALV/30)
C = ALV for such position
D = 12 bid period rolling average of block and credit hours flown by reserve pilots for such position + H for such position
E = 12 bid period rolling average of reserve duty periods worked for such position
F = 12 bid period rolling average of scheduled block and credit hours for such position
G = 12 bid period rolling average GS/GSWC/IA/IAWC hours flown, minus one standard deviation for such position
Note: In determining a 12-bid period rolling average, the Company will use the least recent 12 of the previous 14 bid periods.

2. For each position in each bid period:
a. Regular pilots = (A + B)/C
b. Domestic reserve pilots = [(D /60) x 0.6 + (E /14) x 0.4] x (A/F)
c. International reserve pilots = [(D /60) x 0.8 + (E/14) x 0.2] x (A/ F)
3. For each position in each bid period, the total pilots required will be determined as follows:
a. Total pilots for a domestic position = regular pilots + domestic reserve pilots.
b. Total pilots for an international position = regular pilots + international reserve pilots