The proposed joint resolution seeks to amend the Constitution of the State of Iowa by introducing a new section that establishes a two-thirds majority vote requirement for certain state tax law changes. Specifically, any bill that aims to increase individual or corporate income tax rates, or any tax based on income or legal and special reserves, must receive affirmative votes from at least two-thirds of the members elected to each house of the General Assembly. Additionally, the same two-thirds majority is required for the establishment of any new tax on income or legal and special reserves imposed by the state. The resolution also stipulates that any legal challenges to the enactment of such bills must be filed within one year of their passage.

If the resolution is adopted, it will be submitted to the voters of Iowa for ratification during the general election in November 2026. The amendment aims to ensure greater legislative consensus on tax increases and new tax implementations, thereby potentially limiting the ability of the General Assembly to make significant changes to tax laws without broad support. The General Assembly is also tasked with enacting laws to implement the provisions of this amendment if it is approved by the electorate.