Code of Federal Regulations Title 32. National Defense § 32.2001.47 Destruction

Classified information identified for destruction shall be destroyed completely to preclude recognition or reconstruction of the classified information in accordance with procedures and methods prescribed by agency heads. The methods and equipment used to routinely destroy classified information include burning, cross-cut shredding, wet-pulping, melting, mutilation, chemical decomposition or pulverizing. Agencies shall comply with the destruction equipment standard stated in § 2001.42(b) of this Directive.