A copy of the seniority list will be posted by March. 1 and September 1 of each calendar year on designated bulletin boards with a copy forwarded to the bargaining unit president. Included in the list shall be a breakdown of total hours paid for part-time employees. All lists will include date of hire. Any errors noted in the seniority list should be noted and the employer notified within thirty (30) days, after which the list shall be considered final.