Intelligence Community employees are required to be briefed on various security protocols, at DIA we were required to be briefed on properly handling and securing NATO information. Most IC briefings are simple, employee reads applicable memo and signs name indicating they understand said memo. I signed several documents during my employment with the IC at DIA and CIA.
Below is an authentic NATO security briefing. I was briefed on NATO upon my Entry on Duty at DIA, October 30, 2006. I was read off NATO when I terminated my employment at DIA to transfer to CIA.