CMMC Level 1 is governed by three documents working together: FAR 52.204-21 defines the 15 safeguarding requirements; 32 CFR Part 170 makes them a self-assessed annual program; and the 48 CFR CMMC rule (DFARS 252.204-7021) is the contract clause that makes the requirement enforceable. NIST SP 800-171, DFARS 7012, and the 0–110 SPRS score apply at Level 2 only.
The three official CMMC Level 1 PDFs, downloadable here
These are the DoD Chief Information Officer's authoritative documents for CMMC Level 1. Released September 2024, version 2.13, “DISTRIBUTION STATEMENT A. Approved for public release. Distribution is unlimited.” We mirror them here byte-for-byte so a small contractor can read the real source without hunting through dodcio.defense.gov.
- CMMC Scoping Guide — Level 1 (v2.13)Download PDFDoD-CIO-00005 · Sept 2024 · 6 pages · What's in scope for a Level 1 self-assessment
- CMMC Assessment Guide — Level 1 (v2.13)Download PDFDoD-CIO-00002 · Sept 2024 · 53 pages · Per-practice assessment objectives + evidence examples
- CMMC Model Overview (v2.13)Download PDFDoD-CIO-00001 · Sept 2024 · 46 pages · Full model: 3 levels, 14 domains, every practice mapped to FAR / NIST
Source: U.S. Department of Defense, Office of the Chief Information Officer. Documents reproduced under DoD Distribution Statement A. Custodia is not affiliated with or endorsed by the Department of Defense. For the authoritative DoD copy, visit dodcio.defense.gov/CMMC/Documentation.
The CMMC rules themselves
32 CFR Part 170 — Cybersecurity Maturity Model Certification (CMMC) Program
DoD / eCFR32 C.F.R. § 170 (2024)The DoD's program rule. Defines the three CMMC levels, what each requires, how assessments work, and how affirmations are posted in SPRS. Effective December 16, 2024.
Applies to: Everyone subject to CMMC. The substantive 'what does each level mean' rule.
Read the source →48 CFR CMMC contract clause — Assessing Contractor Implementation of Cybersecurity Requirements (DFARS final rule)
DoD / Federal Register90 Fed. Reg. 41,765 (Sept. 10, 2025)The contract-clause rule that puts CMMC into DoD solicitations. Adds DFARS 252.204-7021 in its final form. Begins landing in new solicitations November 10, 2025, on a phased rollout through November 10, 2028.
Applies to: Any DoD prime or subcontractor receiving a new solicitation in or after phase 1.
Read the source →
The Level 1 safeguarding clause
FAR 52.204-21 — Basic Safeguarding of Covered Contractor Information Systems
GSA / acquisition.gov48 C.F.R. § 52.204-21 (b)(1)(i)–(xv)The 15 safeguarding requirements every CMMC Level 1 contractor must implement. These are not new — they have been in federal contracts since 2016. CMMC Level 1 is structurally the same controls plus an annual SPRS affirmation.
Applies to: Any federal contractor (DoD or civilian) handling Federal Contract Information (FCI) above the micro-purchase threshold.
Read the source →
The CUI / Level 2 frameworks (referenced, not required for L1)
DFARS 252.204-7012 — Safeguarding Covered Defense Information and Cyber Incident Reporting
DoD / acquisition.gov48 C.F.R. § 252.204-7012Requires contractors handling Controlled Unclassified Information (CUI) to meet NIST SP 800-171 and report cyber incidents within 72 hours. This is the Level 2 trigger; if your contract has 7012, you are not a Level 1 contractor.
Applies to: DoD contractors handling CUI ('Covered Defense Information').
Read the source →DFARS 252.204-7019 & 7020 — NIST SP 800-171 DoD Assessment Requirements (and posting requirement)
DoD / acquisition.gov48 C.F.R. § 252.204-7019, -7020Requires contractors subject to 7012 to have a current Basic Assessment score (–203 to +110) posted in SPRS at award. This is the 0–110 'SPRS score' that primes ask about — it does not apply to Level 1 contractors.
Applies to: DoD contractors handling CUI.
Read the source →DFARS 252.204-7021 — Contractor Compliance with the Cybersecurity Maturity Model Certification Level Requirements
DoD / acquisition.gov48 C.F.R. § 252.204-7021The CMMC contract clause itself. Once present in a solicitation, the contractor must have the required CMMC level (1, 2, or 3) at award and maintain it throughout performance.
Applies to: Any DoD solicitation that includes the clause once Phase 1 rolls onto the contract type.
Read the source →
Assessment guides (what an assessor actually looks at)
DoD CMMC Scoping Guide — Level 1 — CMMC Scoping Guide — Level 1 (v2.13, September 2024)
DoD CIOOUSD(A&S), CMMC PMO, Sept. 2024 — DoD-CIO-00005 (ZRIN 0790-ZA21)The DoD's official guide for determining what's in scope for a Level 1 self-assessment. Confirms the 15 safeguarding requirements count and explains how to draw the boundary around the systems that handle FCI. Mirrored on this site under DoD Distribution Statement A.
Applies to: Every CMMC Level 1 contractor.
Read the source →CMMC Assessment Guide — Level 1 — CMMC Assessment Guide — Level 1 (v2.13, September 2024)
DoD CIOOUSD(A&S), CMMC PMO, Sept. 2024 — DoD-CIO-00002 (ZRIN 0790-ZA18)The official walkthrough of every Level 1 practice with assessment objectives, examine/interview/test methods, and example evidence. This is the guide that splits some FAR requirements into multiple sub-practice IDs (hence the '17' you see in older articles — the regulatory count remains 15). Mirrored on this site under DoD Distribution Statement A.
Applies to: Every CMMC Level 1 contractor and assessor.
Read the source →DoD CMMC Model Overview — Cybersecurity Maturity Model Certification (CMMC) Model Overview (v2.13, September 2024)
DoD CIOOUSD(A&S), CMMC PMO, Sept. 2024 — DoD-CIO-00001 (ZRIN 0790-ZA17)The DoD's top-level explainer of the CMMC model: the three levels, the 14 domains, and the full matrix of every practice across Levels 1, 2, and 3 with FAR / NIST source mappings. Useful for understanding where Level 1 sits in the larger model. Mirrored on this site under DoD Distribution Statement A.
Applies to: Every CMMC contractor — Level 1 contractors use the Level 1 column.
Read the source →NIST SP 800-171A — Assessing Security Requirements for Controlled Unclassified Information
NISTNIST SP 800-171A Rev. 3 (May 2024)The 320 assessment objectives that map to the 110 NIST SP 800-171 controls. Defines what evidence satisfies each control. Anchor reference for any L2 assessment; L1 contractors only encounter the 59 objectives that map to the 15 FAR safeguarding requirements.
Applies to: Primarily Level 2. Referenced by Level 1 only where FAR-NIST overlap exists.
Read the source →
False-statement exposure (what's at stake on a bad affirmation)
18 U.S.C. § 1001 — False statements to the federal government
Cornell LII18 U.S.C. § 1001Federal criminal statute for false statements made to a federal agency. A SPRS affirmation is a statement to the federal government, signed by a senior official.
Applies to: The senior official who signs the SPRS affirmation, personally.
Read the source →False Claims Act — False Claims Act (FCA) — civil liability
Cornell LII31 U.S.C. §§ 3729–3733The civil statute the DOJ's Civil Cyber-Fraud Initiative uses to bring cybersecurity fraud cases. Treble damages plus per-claim penalties. Settlements 2022–2025 range from $1M to $9M+.
Applies to: Any federal contractor — including Level 1 self-attesters — who knowingly files a materially false SPRS affirmation.
Read the source →
Need this translated?
The regulations are the truth, but they are not designed for small business owners to read in one sitting. Every Custodia blog post translates a piece of these documents into plain English — with the regulation cited at the bottom.