In discussions regarding rocket testing, particularly horizontal thrust tests, the necessity of licenses is contingent upon local laws and regulations. For rockets within a specific power range, licensing is required, even if they are not launched vertically. The National Association of Rocketry (NAR) specifies that model rockets, typically under one pound and using motors up to an F power, are subject to restrictions, including a prohibition on horizontal launches. Rockets exceeding these specifications are classified as amateur rockets and require prior approval from aviation authorities, such as the FAA, for launches in designated areas. The FAA regulates model rocketry and commercial space flight, and relevant regulations can be found in the Code of Federal Regulations. Understanding these regulations is crucial for anyone planning to conduct thrust tests or launches.