Army reg 380.53 is Information Systems Security Monitoring. See the related link for full text.
Army Regulation 380-53, titled "Information Security Program," provides guidance and instructions for the management and implementation of information security within the U.S. Army. It establishes policies, procedures, and responsibilities to protect Army information and information systems from unauthorized access, disclosure, and disruption. The regulation also outlines the requirements for conducting information security training, incident response, and reporting.
Army Regulation 530-1 and Army Regulation 25-1
Army Regulation 690-950
I don't thing that the Hungarian army has a regulation 2550.
Army Regulation 600-82
Army Regulation 600-85
It depends which army you mean
Army Regulation 601-210 covers Active and Reserve Components Enlistment Army Regulation 601-280 covers Army Rentention Program
Army Bands.
Army Regulation 614-200, Enlisted Assignments And Utilization Management
Army Regulation 380-10
It depends which army you mean
Army reg 380.53