Synopsis As Introduced Amends the General Assembly Article of the Illinois Pension Code. Restricts participation in the General Assembly Retirement System to persons who became participants before the effective date of the amendatory Act. Beginning in fiscal year 2018, makes funding changes. Requires the Board to recalculate and recertify the amount of the State's required contribution for fiscal year 2018. Establishes a voluntary defined contribution plan for certain Tier 1 members and makes conforming changes in the Retirement Systems Reciprocal Act (Article 20 of the Code). Repeals provisions concerning a defined contribution plan added by Public Act 98-599, which has been held unconstitutional. Effective immediately.