approval is received from the House and Senate Committees on Appropriations, not to exceed 10 percent of any funding level specified for projects and activities in the table referred to in the preceding proviso may be transferred to any other funding level specified for projects and activities in such table and no transfer of such funding levels may increase or decrease any funding level in such table by more than 10 percent: Provided further, That of the amounts made available under this heading for terminal facilities, $15,000,000 shall be made available for the purposes, and in amounts, specified for Congressionally Directed Spending in the table entitled Congressionally Directed Spending included in the report accompanying this Act: Provided further, That, of the amounts made available under this heading in this Act, $469,000,000 is designated by the Congress as being for an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985. RESEARCH, ENGINEERING, AND DEVELOPMENT (AIRPORT AND AIRWAY TRUST FUND) For necessary expenses, not otherwise provided for, for research, engineering, and development, as authorized under part A of subtitle VII of title 49, United States Code, including construction of experimental facilities and acquisition of necessary sites by lease or grant, $260,000,000, to be derived from the Airport and Airway Trust Fund and to remain available until September 30, 2026: Provided, That there may be credited to this appropriation as offsetting collections, funds received from States, counties, municipalities, other public authorities, and private sources, which shall be available for expenses incurred for research, engineering, and development: Provided further, That amounts made 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