Colorado constitution
Article IX
Section 17

(5) MAINTENANCE OF EFFORT. Monies appropriated from the state education fund shall not be used to supplant the level of general fund appropriations existing on the effective date of this section for total program education funding under the Public School Finance Act of 1994, article 54 of title 22, Colorado Revised Statutes, and for categorical programs as defined in subsection (2) of this section. In state fiscal year 2001-2002 through state fiscal year 2010-2011, the general assembly shall, at a minimum, annually increase the general fund appropriation for total program under the "Public School Finance Act of 1994," or any successor act, by an amount not below five percent of the prior year general fund appropriation for total program under the "Public School Finance Act of 1994," or any successor act. This general fund growth requirement shall not apply in any fiscal year in which Colorado personal income grows less than four and one half percent between the two previous calendar years.