AZ HB2756

Establishes a presumption that a driver is under the influence and impaired by marijuana if their blood concentration of tetrahydrocannabinol (THC) is 2.0 nanograms per milliliter or more within two hours of driving.

Amends DUI statutes (sections 28-1381, 28-1382, 28-1387, 28-1401, and 28-3319) to incorporate marijuana impairment provisions alongside existing alcohol-related DUI laws.

Updates references throughout home detention and continuous alcohol monitoring program statutes to include provisions for persons sentenced under revised DUI statutes.

Aligns marijuana DUI presumption with existing alcohol concentration presumptions, allowing the presumption to be rebutted by other competent evidence.

Applies the marijuana impairment presumption in trials, actions, or proceedings for DUI violations (excluding commercial vehicle cases) to establish presumptive impairment similar to the 0.08 alcohol concentration threshold.