Locally, all Illinois school districts receive their funding through the levy process. The taxes levied annually are currently limited through the Property Tax Extension Limitation Law (PTELL) to the lesser of a 5% growth or an increase equal to the CPI plus new growth. This increase then assists in determining the budget for the District. After officially adopting the levy, the District must file the levy, representing the dollar amounts levied, with the County Clerk's Office before the last Tuesday in December. The County Clerk extends the taxes based on valuations and levies supplied by the District.