Podcast Summary: Sum IT Up — "NIST 800-171 rev. 3 is Coming ... But Not How You Think"
Host: Summit 7
Air Date: April 16, 2026
Episode Overview
This episode tackles the intense confusion among defense contractors regarding the timeline for mandatory implementation of NIST SP 800-171 Revision 3 (Rev 3). Despite Rev 3 having been published two years ago, contractors are still held to Revision 2 (Rev 2) — and so is the Department of Defense’s CMMC assessment program. The hosts break down why this is the case, the mechanics of the current regulatory hold-up, and what signals contractors need to track to anticipate the shift to Rev 3.
Key Discussion Points & Insights
1. Why Are Contractors Still on 171 Rev 2? (00:00–02:53)
- Context: NIST 800-171 Rev 3 has been live since May 2024. DFARS clause 252-204-7012 says contractors must implement the "most current" version; yet contractors are still working with Rev 2, not Rev 3.
- Central Question: "When are defense contractors going to be required to implement 171 Rev 3?" (A, 00:37)
- Short Answer: Contractors won't need to implement Rev 3 until Class Deviation 2024-O0013 is rescinded.
- Anticipated Timeline: Don't expect Rev 3 to be required before the end of 2026, based on the sluggish pace of current CMMC 3.0 rulemaking (A, 02:35).
2. Understanding Class Deviations (03:25–09:32)
- Definition: "A class deviation is a formal temporary authorization in federal procurement allowing agencies to bypass, alter or ignore specific federal acquisition regulation..." (A, 03:38)
- Purpose: Used to quickly address new or urgent policy changes without lengthy rulemaking; applies to all affected contracts.
- Examples: From restrictions on buying foreign-made drones to requirements for domestically produced flatware (A, 04:07).
Key Quote
"Basically, class deviations say, use this contract clause language instead of whatever is currently in the FAR or DFARS until further notice." — A (03:59)
- Process: The internal handling of deviations is bureaucratic and varies by agency; yet in this cybersecurity instance, it was vital in averting chaos.
3. The Specifics of Deviation 2024-O0013 (05:57–09:32)
- What It Does: Requires DoD contractors to comply with NIST 800-171 Rev 2 for DFARS 252-204-7012, regardless of newer revisions.
- Why It's Important: Keeps assessment and compliance requirements in sync while rulemaking catches up.
- What Would Happen Without It: Contractors would have to implement Rev 3 (and every future revision) immediately upon NIST release, leading to major compliance and assessment mismatches.
Notable Moment
"If they had never issued a deviation, whatever the most current version of 800-171 is at the time you get a contract solicitation, you have to implement...Rev 2, rev 3, rev 8, rev 11." — A (08:35)
- Key Point: "Existing pause from year 10 years ago...If you scroll down, it's all identical except for paragraph B2I. And it says the covered Contractor Information System shall be subject to the security requirements in NIST SP 800-171, Revision 2..." — A (07:15)
4. Why Was the Deviation Issued? (09:32–12:52)
- Reason: Prevents a scenario where contractors would have to comply with Rev 3 for contracts, but be assessed (via CMMC) against Rev 2, creating an impossible compliance gap.
- Rulemaking Timing: CMMC rulemaking was (and still is) a protracted process; deviation bridges the gap until the machinery of federal regulation can catch up.
- Result: The deviation stays until new CMMC rules are finalized; only then will Rev 3 become the requirement via rescinding/replacing the deviation.
Key Quote
"They needed to issue this deviation to say CMMC and 7012 are on the same revision because the language in 7012 doesn't specify a revision and there wasn't enough time to go through rulemaking to change DFARS 7012." — A (11:02)
5. When Will Rev 3 Be Required? (12:52–16:00)
- Conditions for Change: When CMMC 3.0 rulemaking completes, DoD will rescind or replace the class deviation, activating Rev 3.
- Training Impact: ISACA, the new body handling assessor training, is already planning for Rev 3-based courses, enabling a smooth transition (B, 16:00).
- Contractor Strategy: Many are "future-proofing" by bridging some controls and parameters now.
Memorable Prediction
"The earliest we could possibly see 171 Rev 3 requirements would be the end of 2026. Something might change...but based off everything that I've heard...that is basically when it is going to happen." — A (02:34) / B (02:53)
6. How Will the Transition Happen? (16:00–18:54)
- Rollout Speculation: Could be an immediate switchover ("Now new solicitations say comply with Rev 3"), or there may be a brief grace period — but don't expect much advance notice.
- Historical Parallel: Past deviations sometimes came with little warning; be ready to move fast (B, 18:23).
Notable Quote
"I would plan, worst case, that you wake up one day, they rescind the deviation, they put in a new one and they say, Bob's your uncle, now you got to do Rev 3 whenever you get a new solicitation." — A (17:01)
7. Wrapping Up: What Should Contractors Watch For? (18:54–20:48)
- Key Signs: Major movement on CMMC 3.0 rulemaking is the top indicator that Rev 3 requirements are coming.
- Final Timeline: Expect the earliest compliance date to be late 2026. The training/assessment ecosystem likely won’t cause major delays.
- Advice: Stay alert for updates on rulemaking progress; once things move, deadlines could hit quickly.
Summary Statement
"At least you know what the major things are that need to happen on that timeline." — A (19:55)
Timestamps for Important Segments
- 00:00 — Episode context: Why contractors are still on Rev 2
- 02:35 — Expected timeline for Rev 3 enforcement
- 03:25 — What is a class deviation?
- 07:15 — How deviation 2024-O0013 works in DFARS 7012
- 09:32 — Why the deviation was needed to prevent chaos
- 12:52 — Relationship between class deviations and CMMC rulemaking
- 16:00 — Training and assessment ecosystem catch-up
- 16:57 — How the rescinding of the deviation may roll out
- 18:54 — Realistic expectations and contractor preparation
- 20:13–20:48 — Final wrap-up and actionable advice
Notable Quotes (with Attribution & Timestamp)
-
On the audience’s core question:
"This is probably one of the most common questions that we get every week, every day. Some people are excited for 171 Rev 3. Some people are dreading it."
— A (00:44)
-
On rulemaking pace:
"Given the current pace of 'CMMC 3.0' rulemaking, I think that the earliest we could possibly see 171 Rev3 requirements would be the end of 2026."
— A (02:38)
-
On the impact of the class deviation:
"If they had never issued a deviation...you have to implement whatever the most current version is. Rev 2, Rev 3, Rev 8, Rev 11..."
— A (08:36)
-
On the deviation’s purpose:
"They needed to issue this deviation to say CMMC and 7012 are on the same revision because the language in 7012 doesn’t specify a revision..."
— A (11:02)
-
On contractor planning:
"I would plan, worst case, that you wake up one day, they rescind the deviation, they put in a new one and they say, Bob’s your uncle, now you got to do Rev 3..."
— A (17:01)
Tone & Takeaways
The hosts maintain their signature practical and occasionally irreverent tone ("who numbers something with an O and a zero next to each other?"). They focus on demystifying regulatory processes for busy defense contractors, emphasizing critical calendar milestones and pragmatic planning. Their bottom line: watch for CMMC rulemaking updates, because that’s when the real transition to NIST 800-171 Rev 3 will finally kick off.
If you care about CMMC or NIST news, like, subscribe, and stay tuned — this is the show that will break it down for you.