available under this heading shall be used in accordance with the report accompanying this Act: Provided further, That not to exceed 10 percent of any funding level specified under this heading in the report accompanying this Act may be transferred to any other funding level specified under this heading in the report accompanying this Act: Provided further, That no transfer may increase or decrease any funding level by more than 10 percent: Provided further, That any transfer in excess of 10 percent shall be treated as a reprogramming of funds under section 405 of this Act and shall not be available for obligation or expenditure except in compliance with the procedures set forth in that section. GRANTS-IN-AID FOR AIRPORTS (LIQUIDATION OF CONTRACT AUTHORIZATION) (LIMITATION ON OBLIGATIONS) (AIRPORT AND AIRWAY TRUST FUND) (INCLUDING TRANSFER OF FUNDS) For liquidation of obligations incurred for grants-in-aid for airport planning and development, and noise compatibility planning and programs as authorized under subchapter I of chapter 471 and subchapter I of chapter 475 of title 49, United States Code, and under other law authorizing such obligations