PUBLIC LAW 106-398 —APPENDIX 114 STAT. 1654A-89 of landing fees imposed under the pilot program for use of a military airfield" and inserting "Amounts received in payment of landing fees for use of a military airfield in a fiscal year of the pilot program". (d) REPORT.— Subsection (d) of such section is amended— (1) by striking "March 31, 2000," and inserting "March 31, 2003,"; and (2) by striking "December 31, 1999" and inserting "December 31, 2002". SEC. 388. EXTENSION OF AUTHORITY TO SELL CERTAIN AIRCRAFT FOR USE IN WILDFIRE SUPPRESSION. Section 2 of the Wildfire Suppression Aircraft Transfer Act of 1996 (Public Law 104-307; 10 U.S.C. 2576 note) is amended— (1) in subsection (a)(1), by striking "September 30, 2000" and inserting "September 30, 2005"; (2) in subsection (d)(1)— (A) by striking "the date of the enactment of this Act" and inserting "October 14, 1996"; and (B) by adding at the end the following: "The regulations prescribed under this paragraph shall be effective until the end of the period specified in subsection (a)(1)."; and (3) in subsection (f), by striking "March 31, 2000" and inserting "March 31, 2005". SEC. 389. DAMAGE TO AVIATION FAdLITIES CAUSED BY ALKALI SILICA REACTIVITY. (a) ASSESSMENT OF DAMAGE AND PREVENTION AND MITIGATION TECHNOLOGY. — The Secretary of Defense shall require the Secretaries of the military departments to assess— (1) the damage caused to aviation facilities of the Armed Forces by alkali silica reactivity; and (2) the availability of technologies capable of preventing, treating, or mitigating alkali silica reactivity in hardened concrete structures and pavements. (b) EVALUATION OF TECHNOLOGIES.—(1) Taking into consideration the assessment under subsection (a), the Secretary of each military department may conduct a demonstration project at a location selected by the Secretary concerned to test and evaluate the effectiveness of technologies intended to prevent, treat, or mitigate alkali silica reactivity in hardened concrete structures and pavements. (2) The Secretary of Defense shall ensure that the locations selected for the demonstration projects represent the diverse operating environments of the Armed Forces. (c) NEW CONSTRUCTION.—The Secretary of Defense shall develop specific guidelines for appropriate testing and use of lithium salts to prevent alkali silica reactivity in new construction of the Department of Defense. (d) COMPLETION OF ASSESSMENT AND DEMONSTRATION.—The assessment conducted under subsection (a) and the demonstration projects, if any, conducted under subsection (b) shall be completed not later than September 30, 2006. (e) DELEGATION OF AUTHORITY.—The authority to conduct the assessment under subsection (a) may be delegated only to the Chief of Engineers of the Army, the Commander of the Naval Facilities Engineering Command, and the Civil Engineer of the Air Force.