; and (B) for any administrative and operating expenses of the Corporation in carrying out the insurance program. (c) Certification of premium charges The Corporation may not assess any premium charges established under this section before the charges have been certified as actuarially sound by the Disaster Insurance Advisory Commission established by section 826. (d) Credit for initial contributions The Corporation shall credit the amount of the payment made by a State pursuant to section 821(d)(1) toward any premium charges under this section owed by the State. (e) Federal contribution (1) Credit toward premiums For each fiscal year, the amount of the premium charges owed for such fiscal year by each State that is participating in the Corporation and the insurance program under this subtitle shall be reduced by the amount determined for such State under paragraph (2). (2) Amount For a fiscal year, the amount determined under this paragraph for each State that is a participant shall be the amount that bears the same percentage to the full premium charges owed by such State for such fiscal year as the total amount appropriated pursuant to paragraph (3) for such fiscal year bears to the sum of all premium charges owed by all participating States for such fiscal year. (3) Authorization of appropriations There is authorized to be appropriated to the Corporation for each fiscal year an amount equal to 10 percent of the sum of all premium charges owed by all States participating in the Corporation and the insurance program under this subtitle for such fiscal year. 805. Claims (a) Procedure The Corporation shall adjust and pay all claims for proved and approved losses and costs covered by insurance provided under this subtitle. (b) Effect of duplicative coverage The amount of any claim paid for losses or costs under the insurance program may not include any amount for any portion of such losses or costs covered by amounts provided under any other source of insurance or financial assistance. (c) Effect of flood