Exemptions from the requirements of this chapter shall be:
   (a)   Any employer of less than twelve persons.  The members of the immediate family of any employer shall not be included in determining the number of employees.
   (b)   Any religious organization or institution whose membership or service is limited to persons of a single faith.
   (c)   Any private organization having a purely social or fraternal purpose.
   (d)   Any type of employment where religion, religious creed or nationality would usually and normally be considered an essential qualification of employment.
      (Ord. 44, 1963.)