Final answer:
Seniority between same day promotees is determined by their record of promotions, reductions, transfers, casualties, etc. during active service.
Step-by-step explanation:
According to the Illinois State Police Troopers, Special Agents, and Sergeants Collective Bargaining Agreement, seniority between same day promotees shall be determined by their Record of Promotions, reductions, transfers, casualties, etc., during active service. This means that the individual with a higher number of promotions, reductions, transfers, casualties, etc. will have higher seniority.
For example, if two troopers are promoted on the same day, the trooper with a higher number of recorded promotions, reductions, transfers, casualties, etc. will have seniority over the other trooper.