This bill, titled the "Small Unmanned Aircraft Systems Operational Test, Evaluation, and Training Corridor Act," mandates the Secretary of Defense to establish or designate, and operate, one or more test and training corridors for small unmanned aircraft systems (UAS) and counter-UAS platforms. These corridors will be located within the national airspace system and are intended to support comprehensive research, development, testing, evaluation, and training for members of the Armed Forces. The functions of these corridors include advancing UAS autonomy software, kinetic and nonkinetic payloads, sensors, and communication technologies, as well as developing counter-UAS capabilities such as high-power microwave, high-energy laser, and electronic warfare systems. In establishing these corridors, the Secretary of Defense must coordinate with relevant entities to identify optimal locations, assess the utility of existing facilities, and determine necessary resources, including military construction and personnel costs. The selection process will prioritize sites capable of simulating operationally realistic environments, including those with denied or degraded communications , electromagnetic spectrum, and global positioning systems. Furthermore, the bill requires identifying and addressing any interagency, legal, regulatory, or policy impediments to conducting these advanced testing and training activities, particularly concerning electronic warfare and directed energy capabilities. The Secretary must also consider diverse geographic regions across the United States and notify Congress within 90 days of a corridor's establishment, detailing its location, resources, and any required interagency agreements.