The application of the exemption is limited to employees ``employed
by'' a radio or television station. The question whether a worker is
employed ``by'' a radio or television station depends on the particular
facts. (See Rutherford Food Corporation v. McComb, 331 U.S. 722; U.S. v.
Silk, 331 U.S. 704.) In general, however, an employee is so employed
where he is hired by the radio or television station, engages in its
work, is paid by the radio or television station and is under its
supervision and control. Employees of independent contractors and of
others who work for a radio or television station but who are not
``employed by'' such station are not exempt under this exemption even if
they engage in the named occupation. (Mitchell v. Kroger, 248, F. 2d
935.)