After the completion of the probationary period, the status employee's seniority shall date from the beginning of the probationary period.
Seniority is accumulated on the basis of hours in a pay status exclusive of overtime.
Except an employee does not retain seniority in any class from which he has been demoted because of unsatisfactory performance or for disciplinary reasons. Seniority accrued in a class is retained for that class for purposes of retreat rights even though an employee accepts a position in another class outside of the promotional line. Each employer shall maintain a public and current seniority list which includes the names of all status employees in each class in order of their seniority. Ties in Seniority Lists. Seniority, or service, in a higher class in a promotional line may be added to seniority, or service, earned in a lower class in the same line to compute total seniority, or service, in the lower class.