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a) A disability benefit under this part shall become payable only upon determination by the board that the participant has a total and permanent disability. The board shall require current relevant medical reports by licensed practitioners, including the report of the treating physician, and may make any inquiries necessary to the determination of total and permanent disability. Failure of the participant, or the participant’s guardian or conservator, to provide any documents, complete any forms, or respond to any questions from the board within days of the request may be cause for rejection of the application. (

b) Upon determination by the board that the participant does not have a total and permanent disability, the application for disability benefit, and any designation of beneficiary for the benefit, shall be automatically canceled.