The exemption applies only to an employee who is ``employed as'' an
announcer, news editor, or chief engineer under the conditions specified
in section 13(b) (9). Although the nature of the employer's business is
important in applying the exemption to a particular employee in one of
the named occupations, employment in the named occupation is an
essential prerequisite for exemption. Whether an employee is exempt
therefore depends upon an examination of his duties as well as the
nature of the employer's activities. Some employees of the employer may
be exempt and others may not.