; and for inspection activities and administration of airport safety programs, including those related to airport operating certificates under section 44706 of title 49, United States Code, $3,000,000,000, to be derived from the Airport and Airway Trust Fund and to remain available until expended: Provided , That none of the funds under this heading shall be available for the planning or execution of programs the obligations for which are in excess of $3,350,000,000 in fiscal year 2019, notwithstanding section 47117(g) of title 49, United States Code: Provided further , That none of the funds under this heading shall be available for the replacement of baggage conveyor systems, reconfiguration of terminal baggage areas, or other airport improvements that are necessary to install bulk explosive detection systems: Provided further , That notwithstanding section 47109(a) of title 49, United States Code, the Government’s share of allowable project costs under paragraph (2) for subgrants or paragraph (3) of that section shall be 95 percent for a project at other than a large or medium hub airport that is a successive phase of a multi-phased construction project for which the project sponsor received a grant in fiscal year 2011 for the construction project: Provided further , That notwithstanding any other provision of law, of funds limited under this heading, not more than $112,600,000 shall be available for administration, and not less than $15,000,000 shall be available for the Airport Cooperative Research Program, not less than $33,194,000 shall be available for Airport Technology Research: Provided further , That in addition to airports eligible under section 41743 of title 49, such program may include the participation of an airport that serves a community or consortium that is not larger than a small hub airport, according to FAA hub classifications effective at the time the Office of the Secretary issues a request for proposals. Grants-in-aid for airports For an additional amount for Grants-In-Aid for Airports