Unit Seniority shall mean seniority in a classification within the unit and shall be used for :
(a) Preference of vacations, bonus vacations, holidays;
(b) Assignment of work;
(c) Use of compensatory time and placement on the overtime rotating list in accordance with recognized Divisional Agreements. Where a Divisional Agreement specifies bid rights, those provisions will control over the assignment of work.
“Unit” means an operational section based on common work and/or site location. Unit determination shall be mutually agreed to by the City and the Union and be incorporated into the Divisional Agreements.