Amends TCA Section 55-10-417 and Section 55-10-425.

Tennessee SB1299 amends existing laws regarding ignition interlock devices by changing the calibration requirement from a blood alcohol concentration to a breath alcohol concentration. The bill affects individuals required to use ignition interlock devices due to alcohol and drug offenses, including provisions for active military members to request a toll on their usage period during deployment. Key changes include the process for tolling the usage period, requirements for reinstatement of driver licenses, and adjustments to compliance standards for calibration and monitoring of the devices.