A. Every ski area operator shall file with the department of transportation and keep on file with the department proof of financial responsibility in the form of a current insurance policy in a form approved by the department, issued by an insurance company authorized to do business in the state and conditioned to pay, within the limits of liability prescribed in this section, all final judgments for personal injury or property damage proximately caused by or resulting from negligence of the ski area operator covered by the policy, as such negligence is defined and limited by the Ski Safety Act. The minimum limits of liability insurance to be provided by ski area operators shall be as follows:
B. No ski lift or tramway shall be operated in this state after the effective date of the Ski Safety Act unless a current insurance policy as required by this section is in effect and properly filed with the department of transportation. Each policy shall contain a provision that it cannot be canceled prior to its expiration date without thirty days' written notice of intent to cancel served by registered mail on the insured and on the department.