Jim Lux wrote:
. . .
The export controls still exist, by the way, for NEC4.. when you get a
copy, don't you have to certify who the end user is? and agree to ITAR
compliance, etc.

https://ipo.llnl.gov/technology/soft...uments/NEC.pdf

Until a few years ago, NEC-4 could only purchased by a U.S. citizen for
use within the U.S. Anyone else would have to apply for an exception via
diplomatic channels.

Now, there are no restrictions except for a very few prohibited
countries (e.g., North Korea). Licenses are routinely granted for users
all over the world. The program is, however, still protected by copyright.

Roy Lewallen, W7EL