The work week for all classified nonrepresented employees shall be established by the mayor in accordance with what s/he deems necessary and appropriate for efficient functioning of the city government. Classified nonrepresented employees who are FLSA exempt shall in no instance be accorded premium pay for the following: overtime, call back, or, if necessary, for working a holiday designated in this chapter. No classified nonrepresented employee shall be accorded premium pay for longevity. (Ord. 1594-89 § 2(A), 1989.)