Each employer must have a written promotional policy which:

(1) Defines who is considered a promotional candidate, including whether probationary employees and permanent employees who have left the employer to accept project or nonpermanent appointments with other employers are considered as promotional candidates;

(2) Identifies the employer's promotional organizational units, if any;

(3) Identifies how promotional preference will be applied in recruitment and certification, if at all; and

(4) Specifies the duration of any promotional candidate lists or pools.