An employe who holds a position with the Commission as of the effective date of this chapter shall, if he has completed his probationary period, be deemed a regular employe under this chapter and continue in that position, unless separated therefrom as provided in this chapter. The employe who has not completed the probationary period at the time this chapter takes effect shall retain his status as a probationary employe until the expiration of that probationary period. If he successfully completes his probationary period, he shall become a regular employe under this chapter and continue in that position unless separated therefrom as provided in this chapter.
37 Pa. Code § 127.12