Illinois Statutes Chapter 40. Pensions § 5/8-232. Basis of service credit

(1) All periods prior to the effective date shall be computed in accordance with the provisions of Section 8-226, except for a re-entrant or future entrant who was not in service on the day before the effective date.

(2) Service subsequent to the day before the effective date, shall include: the actual period of time the employee performs the duties of his position and makes required contributions or performs such duties and is given a city contribution for age and service annuity purposes; leaves of absence from duty, or vacation, for which an employee receives all or part of his salary; periods included under item (c) of Section 8-226; periods during which the employee is temporarily assigned to another position in the service and permitted to make contributions to the fund; periods during which the employee has had contributions for annuity purposes made for him in accordance with law while on military leave of absence during World War II; periods during which the employee receives disability benefit under this Article, or a temporary total disability benefit under the Workers' Compensation Act  1 if the disability results from a condition commonly termed heart attack or stroke or any other condition falling within the broad field of coronary involvement or heart disease;

(3) Service during 6 or more months in any year shall constitute a year of service, and service of less than 6 months but at least 1 month in any year shall constitute a half year of service. However the right to have certain periods of time considered as service as stated in paragraph 2 of Section 8-168 or in Section 8-243 relating to service as Alderperson shall not apply for minimum annuity purposes under Section 8-138 of this Article.