If timely action for economic loss benefits is commenced against a reparation obligor and benefits are denied because of a determination that the obligor’s coverage is not applicable to the claimant under the provisions of section 65B.47 on the priority of applicability of security a claim against a proper obligor or assigned claims plan may be made not later than 90 days after such determination becomes final or the last date on which the action could otherwise have been commenced, whichever is later.