(b) Every insurer shall provide a claimant with the option of submitting any dispute involving the insurer's liability to pay first party benefits, or additional first party benefits, the amount thereof or any other matter which may arise pursuant to subsection (a) of this section to arbitration pursuant to simplified procedures to be promulgated or approved by the superintendent. Such simplified procedures shall include an expedited eligibility hearing option, when required, to designate the insurer for first party benefits pursuant to subsection (d) of this section. The expedited eligibility hearing option shall be a forum for eligibility disputes only, and shall not include the submission of any particular bill, payment or claim for any specific benefit for adjudication, nor shall it consider any other defense to payment.

(c) An award by an arbitrator shall be binding except where vacated or modified by a master arbitrator in accordance with simplified procedures to be promulgated or approved by the superintendent. The grounds for vacating or modifying an arbitrator's award by a master arbitrator shall not be limited to those grounds for review set forth in article seventy-five of the civil practice law and rules. The award of a master arbitrator shall be binding except for the grounds for review set forth in article seventy-five of the civil practice law and rules, and provided further that where the amount of such master arbitrator's award is five thousand dollars or greater, exclusive of interest and attorney's fees, the insurer or the claimant may institute a court action to adjudicate the dispute de novo.

(d) (1) Except as provided in paragraph two of this subsection, where there is reasonable belief more than one insurer would be the source of first party benefits, the insurers may agree among themselves, if there is a valid basis therefor, that one of them will accept and pay the claim initially. If there is no such agreement, then the first insurer to whom notice of claim is given shall be responsible for payment. Any such dispute shall be resolved in accordance with the arbitration procedures established pursuant to section five thousand one hundred five of this article and regulations as promulgated by the superintendent, and any insurer paying first-party benefits shall be reimbursed by other insurers for their proportionate share of the costs of the claim and the allocated expenses of processing the claim, in accordance with the provisions entitled "other coverage" contained in regulation and the provisions entitled "other sources of first-party benefits" contained in regulation. If there is no such insurer and the motor vehicle accident occurs in this state, then an applicant who is a qualified person as defined in article fifty-two of this chapter shall institute the claim against the motor vehicle accident indemnification corporation.

(2) A group policy issued pursuant to section three thousand four hundred fifty-five of this chapter shall provide first party benefits when a dispute exists as to whether a driver was using or operating a motor vehicle in connection with a transportation network company when loss, damage, injury, or death occurs. A transportation network company shall notify the insurer that issued the owner's policy of liability insurance of the dispute within ten business days of becoming aware that the dispute exists. When there is a dispute, the group insurer liable for the payment of first party benefits under a group policy shall have the right to recover the amount paid from the driver's insurer to the extent that the driver would have been liable to pay damages in an action at law.