Year-over-year comparisons used to determine the percentage growth factor of estimated general funds revenues shall exclude the sum of the following: (i) expected revenues resulting from new taxes or fees or from tax or fee increases during the first year of the change, (ii) expected revenues resulting from one-time receipts or non-recurring transfers in, (iii) expected proceeds resulting from borrowing, and (iv) increases in federal grants that must be completely appropriated based on the terms of the grants.
30 ILCS 122/10