513.1  Exemption.
  Unless specific reference is made thereto, no provision of this subtitle shall include or apply to domestic societies which limit their membership to the employees of:
  1.  A particular city or
  2.  A designated firm, business house, or corporation.
[C24, 27, 31, 35, 39, §8894; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §513.1]