An announcer is an employee who appears before the microphone or camera to introduce programs, read news announcements, present commercial messages, give station identification and time signals, and present other similar routine on-the-air material. In small stations, an announcer may, in addition to these duties, operate the studio control board, give cues to the control room for switching programs, make recordings, make the necessary preparations for the day's programs, play records, or write advertising, promotional or similar type copy. An employee who is primarily engaged in the above described activities and in activities which are an integral part thereof will be considered to be employed as an announcer within the meaning of the exemption in section 13(b)(9).