ACCM are security measures used to safeguard classified intelligence or operations and support information when normal measures are insufficient to achieve strict need-to-know controls and where special access program (SAP) controls are not required. ACCM measures are defined as the maintenance of lists of personnel to whom the specific classified information has been or may be provided together with the use of an unclassified nickname, and "ACCM" used in conjunction with the security classification to identify the portion, page, and document containing such specific classified information.