Export control of SCOMET items tightened by amendments expanding nuclear, dual use, machine tool and laser controls. The notification substitutes and expands SCOMET Categories 0, 3 and 4: Category 0 is redefined to list nuclear related prescribed substances and prescribed equipment with licensing by the Department of Atomic Energy and specified thresholds and exclusions; Category 3 revises metal, alloy and explosive entries and adds technology controls; Category 4 is rewritten to control a broad range of precision machinery, test equipment, furnaces, lasers, isotope separation and handling equipment, and associated technology and software, thereby tightening export licensing controls under the Foreign Trade Act.