Synopsis As Introduced Amends the Illinois Municipal Retirement Fund (IMRF) Article of the Illinois Pension Code. Provides that the Board shall determine the amortization period to be used in calculating the amount to be contributed by participating municipalities and participating instrumentalities in order to adjust for changes in the Fund's unfunded accrued liabilities. Specifies that the amortization period shall not exceed 30 years for participating municipalities or 10 years for participating instrumentalities. Allows participating employees to withdraw additional contributions only to the extent permitted by the federal Internal Revenue Code of 1986. Requires the Board to meet at least quarterly (rather than monthly). Also makes technical changes. Amends the State Mandates Act to require implementation without reimbursement. Effective immediately.