Bill No. 139 mandates that school district boards of education in Oklahoma adopt a policy prohibiting the use of cell phones and personal electronic devices by students on campus from the start to the end of the school day, referred to as "bell to bell." This requirement is set to take effect for the 2025-2026 school year, with the option for districts to continue this policy in subsequent years. The policy must include disciplinary procedures for violations and may allow for certain exceptions, such as emergency use or monitoring health issues.

The bill defines key terms, including "bell to bell" and "personal electronic device," and clarifies that school-issued or approved devices for classroom instruction are exempt from the prohibition. The act is set to become effective on July 1, 2025, and includes an emergency clause to ensure its immediate implementation upon passage and approval.