H.B. No. 2440 amends the Transportation Code by adding Section 750.001, which outlines the authority of state agencies and the state's air quality state implementation plan regarding motor vehicles. The new section defines "energy source" as any fuel or power used to power an engine and "engine" as a machine that converts energy into mechanical force and motion. The bill prohibits state agencies from restricting the sale or use of motor vehicles based on their energy source and from prohibiting individuals from owning vehicles powered by engines. Additionally, it mandates that the state's air quality implementation plan cannot include provisions that limit a person's ability to purchase any motor vehicle, including those powered by engines.

The bill is set to take effect on September 1, 2025, following its passage in both the House and Senate in May 2025. The legislation aims to ensure that individuals retain the freedom to purchase and own motor vehicles without restrictions based on the type of energy source used to power them.

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