Illinois Statutes Chapter 40. Pensions § 5/9-220. Basis of service credit

(i) The actual period of time the employee contributes or has contributed to the fund for service rendered to age 65 plus the actual period of time after age 65 for which the employee performs the duties of his position or performs such duties and is given a county contribution for age and service annuity or minimum annuity purposes.

(ii) Leaves of absence from duty, or vacation, for which an employee receives all or part of his salary.

(iii) For a person who first becomes an employee before the effective date of this amendatory Act of the 98th General Assembly, accumulated vacation or other time for which an employee who retires on or after November 1, 1990 receives a lump sum payment at the time of retirement, provided that contributions were made to the fund at the time such lump sum payment was received. The service granted for the lump sum payment shall not change the employee's date of withdrawal for computing the effective date of the annuity.

(iv) For a person who first becomes an employee before the effective date of this amendatory Act of the 98th General Assembly, accumulated sick leave as of the date of the employee's withdrawal from service, not to exceed a total of 180 days, provided that the amount of such accumulated sick leave is certified by the County Comptroller to the Board and the employee pays an amount equal to 8.5% (9% for members of the County Police Department who are eligible to receive an annuity under Section 9-128. 1) of the amount that would have been paid had such accumulated sick leave been paid at the employee's final rate of salary. Such payment shall be made within 30 days after the date of withdrawal and prior to receipt of the first annuity check. The service credit granted for such accumulated sick leave shall not change the employee's date of withdrawal for the purpose of computing the effective date of the annuity.

(v) 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.

(vi) Periods during which the employee receives a disability benefit under this Article.

(vii) For any person who first becomes a member on or after January 1, 2011, the actual period of time the employee contributes or has contributed to the fund for service rendered up to the limitation on salary in subsection (b-5) of Section 1-160 plus the actual period of time thereafter for which the employee performs the duties of his position and ceased contributing due to the salary limitation in subsection (b-5) of Section 1-160.