47 C.F.R. § 5.5
For the purposes of this part, the following definitions shall be applicable. For other definitions, refer to part 2 of this chapter (Frequency Allocations and Radio Treaty Matters; General Rules and Regulations).
Authorized frequency. The frequency assigned to a station by the Commission and specified in the instrument of authorization.
Authorized power. The power assigned to a radio station by the Commission and specified in the instrument of authorization.
Emergency notification providers. All participants in the Emergency Alert System, as identified in section 11.1 of this chapter.
Experimental radio service. A service in which radio waves are employed for purposes of experimentation in the radio art or for purposes of providing essential communications for research projects that could not be conducted without the benefit of such communications.
Experimental station. A station utilizing radio waves in experiments with a view to the development of science or technique.
Harmful interference. Any radiation or induction that endangers the functioning of a radionavigation or safety service, or obstructs or repeatedly interrupts a radio service operating in accordance with the Table of Frequency Allocations and other provisions of part 2 of this chapter.
Landing area. As defined by 49 U.S.C. 40102(a)(28) , any locality, either of land or water, including airdromes and intermediate landing fields, that is used, or intended to be used, for the landing and take-off of aircraft, whether or not facilities are provided for the shelter, servicing, or repair of aircraft, or for receiving or discharging passengers or cargo.
Market trial. A program designed to evaluate product performance and customer acceptability prior to the production stage, and typically requires testing a specific product under expected use conditions to evaluate actual performance and effectiveness.
Open Area Test Site. A site for electromagnetic measurements that has a reflective ground plane, and is characterized by open, flat terrain at a distance far enough away from buildings, electric lines, fences, trees, underground cables, pipelines, and other potential reflective objects, so that the effects due to such objects are negligible.
Person. An individual, partnership, association, joint stock company, trust, corporation, or state or local government.
Product development trial. An experimental program designed to evaluate product performance (including medical devices in clinical trials) in the conceptual, developmental, and design stages, and typically requiring testing under expected use conditions.
47 C.F.R. §5.5