23 Pa. C.S. § 4391
The following words and phrases when used in this subchapter shall have the meanings given to them in this section unless the context clearly indicates otherwise:
"Date of hire." The first day an employee performs services for remuneration.
"Employee." An individual who is an employee within the meaning of Chapter 24 of the Internal Revenue Code of 1986 (Public Law 99-514, 26 U.S.C. § 3401 et seq.). The term shall not include an employee of a Federal or State agency performing intelligence or counter intelligence functions if the head of the agency has determined that reporting the information required by this section with respect to the employee could endanger the safety of the employee or compromise an ongoing investigation or intelligence mission.
"Employer." The term has the meaning given in section 3401(d) of the Internal Revenue Code of 1986 ( Public Law 99-514, 26 U.S.C. § 3401(d) ) and includes any government agency and any labor organization.
"Newly hired employee." The term includes:
23 Pa.C.S. § 4391