(1) Family expense disability insurance is that covering members of any one family including one or both spouses and dependents provided under a master policy issued to the head of the family.

(2) Any authorized disability insurer may issue family expense disability insurance.

(3) A disability policy providing such family expense coverage, in addition to other provisions required to be contained in disability policies under this chapter, shall contain the following provisions:

(a) A provision that the policy and the application of the head of the family shall constitute the entire contract between the parties.

(b) A provision that to the family group originally insured shall, on notice to the insurer, be added from time to time all new members of the family as they become eligible for insurance in such family group, and on the payment of such additional premium as may be required therefor.