MO SJR9

Establishes an "appropriations growth limit" capping annual general revenue appropriation increases to the sum of inflation (based on CPI) plus Missouri's population change, with a floor of zero percent growth

Requires excess general revenue collections above 1% of allowed appropriations to be transferred to the Cash Operating Reserve Fund (capped at 5% of net general revenue) and Budget Reserve Fund (capped at 7% of net general revenue)

Mandates automatic permanent reductions to all state income tax rates when reserve fund balances exceed their caps, with reductions rounded to the nearest quarter percent

Allows the appropriations growth limit to be exceeded only upon a governor-declared emergency and two-thirds vote of both legislative chambers for separate emergency appropriation bills

Splits the existing Budget Reserve Fund into two funds: 67% to a new Cash Operating Reserve Fund (for short-term cash flow needs) and 33% remaining in the Budget Reserve Fund (for emergencies and expenditure restoration), to be submitted to voters at the November 2016 general election