In computing the term of service of an employee prior to the effective date, the entire period beginning on the date he was first appointed and ending on the day before the effective date, except any intervening period during which he was separated by withdrawal from service, shall be counted for all purposes of this Article, except that for any employee who was not in service on the day before the effective date, service rendered prior to such date shall not be considered for the purposes of Section 8-138.
For a person employed by an employer for whom this Article was in effect prior to January 1, 1950, from whose salary deductions are first made under this Article after December 31, 1949, any period of service rendered prior to the effective date, unless he was in service on the day before the effective date, shall not be counted as service.
The time a person was an employee of any territory annexed to the city prior to the effective date shall be counted as a period of service.
In computing the term of service of any employee subsequent to the day before the effective date, the following periods shall be counted as periods of service for age and service, widow's and child's annuity purposes:
For a person employed by an employer in which the 1921 Act was in effect prior to January 1, 1950, from whose salary deductions are first made under the 1921 Act or this Article after December 31, 1949, any period of service rendered subsequent to the effective date and prior to the date he became an employee and contributor, shall not be counted as a period of service under this Article, except such period for which he made payment as provided in Section 8-230 of this Article, in which case such period shall be counted as a period of service for all annuity purposes hereunder.
In computing the term of service of an employee subsequent to the day before the effective date for ordinary disability benefit purposes, all periods described in the preceding paragraph, except any such period for which he receives ordinary disability benefit, shall be counted as periods of service; provided, that for any person employed by an employer in which this Article was in effect prior to January 1, 1950, from whose salary deductions are first made under this Article after December 31, 1949, any period of service rendered subsequent to the effective date and prior to the date he became an employee and contributor, shall not be counted as a period of service for ordinary disability benefit purposes, unless the person made payment for the period as provided in Section 8-230 of this Article, in which case the period shall be counted as a period of service for ordinary disability purposes for periods of disability on or after the effective date of this amendatory Act of 1997.
Overtime or extra service shall not be included in computing any term of service. Not more than 1 year of service shall be allowed for service rendered during any calendar year.
For the purposes of this Section, the phrase "any pension plan established by the local labor organization" means any pension plan in which a participant may receive credit as a result of his or her membership in the local labor organization, including, but not limited to, the local labor organization itself and its affiliates at the local, intrastate, State, multi-state, national, or international level. The definition of this phrase is a declaration of existing law and shall not be construed as a new enactment.
40 ILCS 5/8-226