Proposes a constitutional amendment to impose an appropriation spending limitation and to establish the "Tax Reform Fund" to be used to fund budgetary shortfalls, subject to an appropriation limitation, implement sales tax changes, and allow for certain taxation changes based on revenue triggers, by general law

HJR 1 proposes a constitutional amendment to establish strict spending limits for Missouri's state government. It requires that annual spending not exceed a baseline amount (based on prior year appropriations) adjusted by the state's population growth rate (e.g., 100% of prior spending for population decline, 101% for small growth). It creates a "Tax Reform Fund" within the state treasury to cover budget shortfalls only when spending limits are triggered, using revenues from specific tax changes. The amendment also mandates a two-thirds legislative vote to temporarily exceed the spending limit, with the exception lasting no more than 12 months. This directly affects state budgeting decisions and future tax policy implementation.