Amends the Illinois Municipal Retirement Fund (IMRF) Article of the Illinois Pension Code. In a provision requiring a participating municipality or participating instrumentality to pay an additional contribution to the Fund for certain earnings increases above 6% or 1.5 times the annual increase in the consumer price index-u, whichever is greater, provides that the payments must be concluded within 7 years (instead of 3 years) after receipt of the bill by the participating municipality or participating instrumentality. Effective immediately.