Source [2] does in fact say just that: Quote: "In addition to decreasing property taxes and changing the role of the state, the initiative also contained lang

Source [2] does in fact say just that: Quote: "In addition to decreasing property taxes and changing the role of the state, the initiative also contained language requiring a two-thirds (2/3) majority in both legislative houses for future increases of any state tax rates or amounts of revenue collected, including income tax rates and sales tax rates."