"Benefit year" means the one-year period beginning with the day as of which an insured worker first files a request for determination of his insured status, and thereafter the one-year period beginning with the day as of which he next files such request after the end of his last preceding "benefit year"; provided, that in the case of a combined wage claim filed by an individual in accord with an arrangement entered into by the Commission under the provisions of Section 41-29-140(2) the benefit year shall be that applicable under the law of the paying state. The filing of a notice of unemployment shall be deemed a request for determination of insured status if a current benefit year has not previously been established. Requests for determination of insured status shall be made in accordance with such regulations as the Commission may prescribe.