The author of the piece cited this. Maybe it will be helpful for looking into the matter.
“This latest regulatory assault, published in the June 3 issue of the Federal Register,...”
http://www.gpo.gov/fdsys/pkg/FR-2015-06-03/pdf/2015-12844.pdf
The language of the ITAR statute applies to export of defense articles and defense services. Interpreting the revised rules requires a review of the original statute and the specific definitions of defense articles. The rule suggests that not all munitions are subject to ITAR.
This is why the lawyers get the big bucks.