SEC. 253. EXTENSION OF DEADLINE FOR SELECTION OF HEAVY TRUCK SYSTEM CONFIGURED WITH PALLETIZED LOADING SYSTEMSection 259(b) of the National Defense Authorization Act for Fiscal Years 1988 and 1989 (Public Law 100–180; 101 Stat. 1068) is amended by striking out “24 months after the enactment of this Act” in the first sentence and inserting in lieu thereof “June 4, 1990”.