DFARS

DFARS stands for Defense Federal Acquisition Regulation Supplement. It is a set of regulations issued by the U.S. Department of Defense (DoD) that supplements the Federal Acquisition Regulation (FAR) with additional requirements specific to defense contracts and subcontracts.

DFARS applies to organizations that do business with the DoD, including manufacturers, integrators, and service providers in the defense supply chain. It covers a wide range of topics such as contract clauses, technical data and software rights, specialty metals, counterfeit parts, and cybersecurity obligations.

DFARS and cybersecurity in manufacturing

In industrial and manufacturing environments, DFARS is most commonly referenced in connection with cybersecurity and the protection of Controlled Unclassified Information (CUI). Key DFARS clauses include:

• DFARS 252.204-7012 Safeguarding Covered Defense Information and Cyber Incident Reporting. This clause requires contractors to implement security controls from NIST SP 800-171 for systems that process, store, or transmit CUI, and to report certain cyber incidents to the DoD.
• DFARS 252.204-7019/7020/7021 Clauses related to the DoD assessment methodology and the Cybersecurity Maturity Model Certification (CMMC), which structure how NIST SP 800-171 implementation is assessed for defense suppliers.

For manufacturers, these clauses can affect OT networks, MES/ERP integrations, quality systems, and any environment where design data, technical documentation, or production records may contain CUI or other covered defense information.

Operational meaning

Operationally, DFARS requirements show up as contract language that:

• Drives the need for security controls in IT and OT systems that handle defense-related data.
• Influences how technical data, shop-floor instructions, test results, and configuration records are stored, shared, and transmitted.
• Requires tracking of where CUI resides across MES, PLM, ERP, and document control systems.
• Introduces obligations for incident reporting and cooperation after certain cybersecurity events.

Common confusion

DFARS is often mentioned alongside related frameworks and regulations:

• Not the same as NIST SP 800-171 or NIST SP 800-53. DFARS is a set of acquisition regulations. It frequently references NIST SP 800-171 as the required security control set for protecting CUI in non-federal systems, and NIST SP 800-171 itself is derived from NIST SP 800-53.
• Not the same as CMMC. CMMC is a cybersecurity assessment and maturity model that the DoD uses for certain contracts. DFARS clauses define when and how CMMC (or NIST-based assessments) apply in contracts.
• Not a general cybersecurity standard. DFARS is an acquisition regulation; it includes cybersecurity obligations but also many non-cyber topics.

Relation to NIST 800-171 and CMMC

In the defense industrial base, including manufacturing operations, DFARS is the mechanism that makes adherence to NIST SP 800-171 and, in some cases, CMMC a contractual requirement. When a contract includes DFARS 252.204-7012 or related clauses, it typically obligates the contractor and relevant subcontractors to implement, document, and maintain controls aligned with NIST SP 800-171 for systems handling CUI.