Existing law requires the governing board of any school district to give diligent care to the health and physical development of pupils. Existing law authorizes a school district, county office of education, and charter school to provide emergency naloxone hydrochloride or another opioid antagonist to school nurses or trained personnel who have volunteered, and authorizes school nurses or trained personnel to use naloxone hydrochloride or another opioid antagonist to provide emergency medical aid to persons suffering, or reasonably believed to be suffering, from an opioid overdose, as provided. This bill would prohibit school districts, county offices of education, and charter schools from prohibiting pupils in middle schools, junior high schools, high schools, or adult schools, while on a schoolsite or participating in school activities, from carrying fentanyl test strips or a federally approved opioid antagonist, as provided, for the emergency treatment of persons suffering, or reasonably believed to be suffering, from an opioid overdose.