The Department head shall have the authority to credit an attorney in his/her department with up to 40 hours of vacation and 48 hours of sick leave in addition to normal vacation and sick leave accrual, provided such credit must be made within 180 days of employment. The Department head shall have the authority to provide to an attorney in his/her department advanced levels of vacation accrual as if the attorney had otherwise been working for the County the required number of years for the higher accrual rate, provided such credit must be made within 180 days of employment.