Aerospace and defense contractors that work with the US Department of Defense are required to comply with one or more regulations governing security and the handling of classified information. The National Industrial Security Program (NISP) provides compliance requirements for private industry handling classified information on behalf of the US government. Specifically, the NISP publishes the National Industrial Security Program Operating Manual (NISPOM). NISPOM Chapter 8 provides certification and accreditation requirements for facilities processing or handling classified information. Similarly, the Director of Central Intelligence Directive 6/3 (DCID 6/3) defines the certification and accreditation processes for information technology projects that require Top Secret (TS) or Secure Compartmentalized Information (SCI) clearances.