(a) This chapter shall not apply to any person employed as a household worker in a private home or household who earns less than $750 in cash in any 3-month period from a single private home or household and any person employed as a casual worker in a private home or household who earns less than $750 in cash in any 3-month period from a single private home or household.
(b) This chapter shall not apply to farm laborers or to their respective employers unless such an employer carries insurance to insure the payment of compensation to such employees or their dependents.