Accrual Rates of Maximum Accumulation. The rates at which vacation credits accrue, and the maximum accumulation thereof, are as follows: Length of Service Monthly Accrual Hours Maximum Cumulative Hours Under 5 years 6-2/3 160 5 through 10 years 10 240 11 years 10-2/3 256 12 years 11-1/3 272 13 years 12 288 14 years 12-2/3 304 15 through 19 years 13-1/3 320 20 through 24 years 16-2/3 400 25 through 29 years 20 480 30 years and up 23-1/3 560
