“Exempt employee” shall mean an employee of a private patrol enterprise who is:
(a) Engaged exclusively in stenographic, typing, filing, and clerical work; and
(b) Engaged in private patrol work other than street patrol work, activities, and services. (§ 1, Ord. 661, eff. January 12, 1972, as amended by § 1, Ord. 685, eff. September 12, 1973, and § 1, Ord. 702, eff. April 17, 1974)