Conditions Any waiver granted by the Secretary pursuant to paragraph (1) shall be subject to the following conditions: (A) The applicable airport, city, county, or other political subdivision shall agree that in conveying any interest in the real property which the United States conveyed to the airport, city, or county, the airport, city, or county will receive consideration for such interest that is equal to its current fair market value. (B) Any consideration received by the airport, city, or county under subparagraph (A) shall be used exclusively for the development, improvement, operation, or maintenance of a public airport by the airport, city, or county. (C) Such waiver— (i) will not significantly impair the aeronautical purpose of an airport