40 ILCS 5/15-145.1
Survivor eligibility, vesting, and conditions for a survivor's insurance annuity and lump sum payment amount payable to a survivor's insurance beneficiary of a deceased Tier 2 member shall be determined under the provisions of this Article applicable to survivor's insurance beneficiaries of a deceased Tier 1 member; however, the amount of a survivor's insurance annuity, including the annual increases thereon, shall be calculated pursuant to this Section. The initial survivor's insurance annuity of a survivors insurance beneficiary of a Tier 2 annuitant shall be in the amount of 66 2/3% of the Tier 2 member's retirement annuity at the date of death. In the case of the death of a Tier 2 member who has not retired, eligibility for a survivor's insurance benefit shall be determined by the applicable Section of this Article. The initial benefit shall be 66 2/3% of the earned annuity without a reduction due to age. A survivor's insurance annuity shall be increased (1) on each January 1 occurring on or after the commencement of the annuity if the deceased Tier 2 member died while receiving a retirement annuity or (2) in other cases, on each January 1 occurring after the first anniversary of the commencement of the benefit. Each annual increase shall be calculated at 3% or one half the annual unadjusted percentage increase (but not less than zero) in the consumer price index-u for the 12 months ending with the September preceding each November 1, whichever is less, of the originally granted survivor's insurance annuity . If the annual unadjusted percentage change in the consumer price index-u for the 12 months ending with the September preceding each November 1 is zero or there is a decrease, then the survivor's insurance annuity shall not be increased. A beneficiary of a Tier 2 member who elects the Portable Benefit Package provided under this Article shall not be eligible for the survivor's insurance annuity that is provided under this Section. If 2 or more persons are eligible to receive survivor's insurance annuities as provided under this Section based on the same deceased Tier 2 member, the calculation of the survivor's insurance annuities shall be based on the total calculation of the survivor's insurance annuity and divided pro rata. The changes made to this Section by this amendatory Act of the 98th General Assembly are a clarification of existing law and are intended to be retroactive to the effective date of Public Act 96-889, notwithstanding the provisions of Section 1-103.1 of this Code.
40 ILCS 5/15-145.1