Any employee wishing to leave the city employment in good standing, except for mandatory retirement under § 208.16
of this chapter, shall file with the City Administrator at least 14 days before leaving, a written resignation stating the effective date of the resignation and the reason for leaving. Failure to comply with this procedure may be considered cause for denying the employee future employment and denying terminal leave benefits. Unauthorized absence from work for a period of three working days may be considered by the City Council as a resignation without such benefits.