Each nursing pool shall carry professional and general liability insurance in the amount of one million dollars per occurrence for each person who delivers patient care services. The policy must show coverage using one of the following methods:

(1) The nursing pool maintains insurance coverage in the amount indicated for the nursing pool itself and its employees or agents; or

(2) The nursing pool maintains professional and general liability insurance for its own liability in the amount indicated and only refers self-employed, independent contractors who must maintain their own professional and general liability insurance in the amount indicated. Written evidence of such insurance coverage shall be maintained by the nursing pool in the independent contractor's personnel file for a minimum of three years.