ECCN
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4D993
4D993 “Program” proof and validation “software,” “software” allowing the automatic generation of “source codes,” and operating system “software” that are “specially designed” for “real-time processing” equipment (see List of Items Controlled).
- Category
- Category 4—Computers
- Product group
- D. “Software”
Reason for Control
- AT
Official text
License Requirements
Reason for Control:
AT
Control(s) Country chart(see Supp. No. 1to part 738) AT applies to entire entry AT Column 1
List Based License Exceptions (See Part 740 for a Description of All License Exceptions)
TSR: N/A
List of Items Controlled
Related Controls: N/A
Related Definitions: “Global interrupt latency time” is the time taken by the computer system to recognize an interrupt due to the event, service the interrupt and perform a context switch to an alternate memory-resident task waiting on the interrupt.
Items: a. “Program” proof and validation “software” using mathematical and analytical techniques and designed or modified for “programs” having more than 500,000 “source code” instructions;
b. “Software” allowing the automatic generation of “source codes” from data acquired online from external sensors described in the Commerce Control List; or
c. Operating system “software” “specially designed” for “real-time processing” equipment that guarantees a “global interrupt latency time” of less than 20 microseconds.
ecfr-15cfr774-supp1-2026-08-28 · effective 2026-08-28
Issue date 2026-08-28. Amendment date 2026-08-28.
- eCFR Commerce Control List (15 CFR 774, Supplement No. 1)www.ecfr.gov
- eCFR versioner XML captured at ingestwww.ecfr.gov
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