I used to work for a large satellite operator that, at one time, was an NGO. As a non-US company, ITAR didn't apply, and because of the nature of the work, it attracted talent from all over the world.
Then it went to private ownership, and the division I worked for here in the US suddenly became subject to ITAR. We had some time to prepare before the transition, but we had to start jumping through all sorts of hoops to ensure compliance. There were cases where people (mainly subsystems engineers) could not perform their basic job functions because that would violate ITAR, so TAA's had to be drawn up for every such individual. Fortunately I wasn't part of that paperwork.
However...the COO of the company was one of those non-US persons, and the committee in charge of ITAR compliance decided that his job functions wouldn't be impaired by not having a TAA in place for him. So he was not allowed to be present in the flight operations center during launch missions or major orbital maneuvers...y'know, things that as the COO, he had a vested interest in witnessing.