24 Pa.C.S. § 8308

Any Class T-C or Class T-D member who terminates school service, or if a multiple service member and an active member of the State Employees' Retirement System who terminates State service, with five or more eligibility points shall be entitled to vest his retirement benefits until the member's required beginning date. Any Class T-E, Class T-F, Class T-G or Class T-H member who terminates school service, or if a multiple service member and an active member of the State Employees' Retirement System who terminates State service, with ten or more eligibility points shall be entitled to vest his retirement benefits until his required beginning date.