4 Pa. Code § 611.2 – Duration and extension of probationary periods.

(a) Duration of probationary period. The length of the probationary period required for appointments and promotions for a full-time position is a minimum of 6 months, defined as 180 calendar days, and will be determined by the Office of Administration for each job classification. The probationary period for part-time positions shall be equal to the number of hours in a probationary period for a full-time employee in the same job classification.
(b) Extension of probationary period. The probationary period, except for a trainee job classification, may be extended up to a maximum of 18 months, defined as 545 calendar days (365 calendar days plus 6 months at 30 days per month), at the discretion of the appointing authority. If the appointing authority extends an employee’s probationary period, it must notify the employee in writing at least 1 workday prior to the effective date of the extension. The written notice shall specify the length of the extended probationary period.