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Avionic systems performing critical functions in modern aircraft are potentially susceptible to the hazards of electromagnetic radiation from ground and airborne transmitters. The Federal Aviation Administration (FAA) requested that the Society of Automotive Engineers (SAE) coordinate the development of procedures and guidance material which can be used during the aircraft certification process to ensure adequate protection against High Intensity Radiated Fields (HIRF). This paper addresses the technical challenge of drafting a certification procedure and guidance standard, and the management process used by the SAE subcommittee AE4R to converge a diverse range of opinions by its international membership in the shortest possible time.