There is hereby created in the Treasury of the United States a National Credit Union Share Insurance Fund which shall be used by the Board as a revolving fund for carrying out the purposes of this subchapter. Money in the fund shall be available upon requisition by the Board, without fiscal year limitation, for making payments of insurance under section
1787 of this title, for providing assistance and making expenditures under section
1788 of this title in connection with the liquidation or threatened liquidation of insured credit unions, and for such administrative and other expenses incurred in carrying out the purposes of this subchapter as it may determine to be proper.