Proposing a constitutional amendment dedicating a portion of the revenue derived from state sales and use taxes and insurance premium taxes to the Texas water fund.

SJR 66 proposes a constitutional amendment to dedicate specific tax revenues to Texas' water fund. It would require the state comptroller to deposit excess sales tax revenue (above $46.5 billion annually, capped at $500 million) and the first $500 million of insurance premium tax revenue into the Texas Water Fund each year. The amendment mandates that 25% of initial fund allocations and 80% of pre-2043 deposits go exclusively to the "New Water Supply for Texas Fund," which supports water infrastructure projects. This proposal expires August 31, 2043, and requires voter approval in the November 2025 election. It directly affects how Texas allocates tax revenue for water infrastructure planning and development.