TITLE:DoD Instruction S-5200.16,(U)Objectives and Minimum Standards for Communications Security(COMSEC)Measures Used in Nuclear Command and Control(NC2)Communications,September 27,2019.SUMMARY:This is a controlled document.This Website is not authorized to post controlled documents.Users may contact the OPR listed below to obtain a copy of the Instruction.OPR:DoD CIO,osd.pentagon.dod-cio.mbx.pubs-auditsmail.mil