[Code of Federal Regulations] [Title 47, Volume 4] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 47CFR74.452] [Page 455] TITLE 47--TELECOMMUNICATION CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) PART 74_EXPERIMENTAL RADIO, AUXILIARY, SPECIAL BROADCAST AND OTHER PROGRAM DISTRIBUTIONAL SERVICES--Table of Contents Subpart D_Remote Pickup Broadcast Stations Sec. 74.452 Equipment changes. (a) Modifications may be made to an existing authorization in accordance with Sec. Sec. 1.929 and 1.947 of this chapter. (b) All transmitters initially installed after November 30, 1977, must be certificated for use in this service or other service as specified in Sec. 74.451(a). [68 FR 12765, Mar. 17, 2003]