[Code of Federal Regulations] [Title 21, Volume 3] [Revised as of April 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR179.30] [Page 453] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 179_IRRADIATION IN THE PRODUCTION, PROCESSING AND HANDLING OF FOOD--Table of Contents Subpart B_Radiation and Radiation Sources Sec. 179.30 Radiofrequency radiation for the heating of food, including microwave frequencies. Radiofrequency radiation, including microwave frequencies, may be safely used for heating food under the following conditions: (a) The radiation source consists of electronic equipment producing radio waves with specific frequencies for this purpose authorized by the Federal Communications Commission. (b) The radiation is used or intended for use in the production of heat in food wherever heat is necessary and effective in the treatment or processing of food.