If, after an employer has paid the sum provided for in section 72-420, Idaho Code, into the state treasury a claim is made and dependency proven by a person who during the one (1) year after the death in which a claim may be made was either a minor or mentally incompetent and who during the said year had no person or representative legally qualified under the provisions of the workmen's compensation law to make a claim in his behalf, such sum shall be repaid to the employer on the order of the industrial commission; provided, that nothing in this act shall be construed as extending or increasing the time during which a claim for compensation by a dependent may be made.
Idaho Code § 72-421