(1) Group benefit certificates may provide for the payment of benefits in the event of the death, or death and disability, of:
(a) Persons engaged in a common enterprise or employment.
(b) The employees of any employer.
(2) Group certificates may be issued with or without medical examination and without limitation as to age.
(3) The society shall organize the persons or employees into a lodge or lodges with officers selected in the same manner as officers of other lodges and subject to the provisions of the laws of the society.
(4) Not less than 50 persons may be admitted to membership under one group without medical examination.