I don't think it is the same as vacation time. I do not know the length of service requirement but I believe the hour requirement is 32 hrs as of Jan 1.
As for mentioning the vacation time, I meant to see if anyone knows how to calculate the PH accrual rate like you can with vacation time:
Time with target.....Vacation hrs accrued during pay period
0-5 yrs....................Pay period hrs divided by 52
5-10 yrs..................Pay period hrs divided by 26
10+ yrs...................Pay period hrs divided by 17.33