The costs of purchasing an insurance policy that provides for cancer coverage in compliance with this article, or the costs of providing such benefits through a self-funded system in compliance with this article, must be borne solely by the employer that employs the eligible first responder and may not be funded partially or wholly by individual first responders. In addition to any other purpose authorized, county governing authorities and municipal governing authorities may use proceeds from county and municipal taxes for the purposes of providing insurance in compliance with this article. The computation of premium amounts by an insurer for the coverage under this article shall be subject to generally accepted adjustments from insurance underwriting.