; and (2) by adding at the end the following: D Disaster sup­ple­men­tal food and shelter grants 331. Grants by the Administrator Not later than 30 days after the date on which amounts become available to carry out this subtitle, the Administrator of the Federal Emergency Management Agency (referred to in this subtitle as the Administrator ) shall award a grant for the full amount that Congress makes available for the program under this subtitle to the National Board for the purpose of providing disaster supplemental food and shelter grants to needy individuals through private nonprofit organizations and local governments in accordance with section 333. 332. Retention of interest earned (a) In general Interest accrued on the balance of any grant to the National Board under this subtitle shall be available to the National Board for reallocation. (b) Determination of costs Total administrative costs shall be determined based on the total amount of funds available, including interest and any private contributions that are made to the National Board. 333. Purposes of grants (a) Eligible activities Grants to the National Board under this subtitle may be used— (1) to supplement and expand ongoing efforts to provide shelter, food, and supportive services for any area for which the President declares a major disaster under section 401 of the Robert T. Stafford Disaster Relief and Emergency Assistance Act ( 42 U.S.C. 5170 ); (2) to strengthen efforts to create more effective and innovative local disaster response programs by providing funding for those programs; and (3) to conduct minimum rehabilitation of existing mass shelter facilities, but only to the extent necessary to make facilities safe, sanitary, and bring facilities into compliance with local building codes. (b) Limitations on activities (1) Eligible programs The National Board may only provide funding provided under this subtitle for programs that are— (A) carried out by private nonprofit organizations and local governments