53 Pa. Stat. § 896.102
The following words and phrases when used in this act shall have the meanings given to them in this section unless the context clearly indicates otherwise:
"Active employment." The situation of an individual, other than an independent contractor, who performs for compensation regular services for a municipality and who is regularly entered on the payroll of the municipality.
"Chief administrative officer." The person who has the primary responsibility for the execution of the administrative or management affairs of a municipal retirement system or the designee of that person.
"Firefighter." A municipal employee who holds a full-time position in the firefighting service of a municipality and has retirement coverage provided by a retirement system.
"Municipality." A borough, city, county of the second class, incorporated town or township, however constituted, whether operating under a legislative charter; a municipal code; an optional charter adopted under the act of July 15, 1957 (P.L. 901, No. 399), known as the Optional Third Class City Charter Law; a home rule charter or an optional plan adopted under the act of April 13, 1972 (P.L. 184, No. 62), known as the Home Rule Charter and Optional Plans Law; or other arrangement; or an association of these municipalities cooperating under the act of July 12, 1972 (P.L. 762, No. 180), referred to as the Intergovernmental Cooperation Law.
"Police officer." A municipal employee who holds a full-time position in the police service of a municipality and has retirement coverage provided by a retirement system.
"Postretirement adjustment." An increase in or change in the amount of a retirement annuity, retirement benefit, service pension or disability pension benefit granted or effective after active employment ceases.
"Public employee retirement system." An entity, whether a separate entity or part of a governmental entity, that collects retirement and other employee benefit contributions from government employees and employers; holds and manages the resulting assets as reserves for present and future retirement annuity, retirement benefit, service pension, or disability pension benefit payments; and makes provision for these payments to qualified retirees and beneficiaries.
"Retirement benefit." The amount paid on a regular basis to a retired or disabled police officer or firefighter by a municipal retirement system established for police officers or firefighters.
"Retirement system." A public employee retirement system.
"Special ad hoc municipal police and firefighter postretirement adjustment," "special ad hoc adjustment" or "special ad hoc postretirement adjustment." An increase in the amount of a retirement benefit as provided for under this act.
"Years of service." The number of whole years of active, full-time employment as a police officer or firefighter credited under the retirement system.
"Years on retirement." The number of whole years that a police officer or firefighter has been retired as of January 1, 2001.
53 P.S. § 896.102