Understanding the Official CUI RegistryTheControlled Unclassified Information (CUI) Registryis theauthoritative sourcefor all federal agencies'CUI categories and indices. It is maintained by theNational Archives and Records Administration (NARA)and provides:
✅Acomprehensive listof CUI categories and subcategories.
✅Details onwho can handle, store, and share CUI.
✅Guidance onCUI marking and safeguarding requirements.
TheOfficial CUI Registryis theonly federal resourcethat listsall CUI categories and agencies that use them.
32 CFR Section 2002(Option A) definesCUI policiesbut doesnotprovide a full listing of CUI categories.
Executive Order 13556(Option C) established theCUI Programbut doesnotmaintain an active list of categories.
The "Official CMMC Registry" (Option D) does not exist—CMMC is a security framework, not a CUI classification system.
Why "Official CUI Registry" is Correct?Breakdown of Answer ChoicesOption
Description
Correct?
A. 32 CFR Section 2002
❌Incorrect–Defines CUI program rules butdoes not listcategories.
B. Official CUI Registry
✅Correct – The registry contains the full list of CUI categories.
C. Executive Order 13556
❌Incorrect–Established the CUI program butdoes not maintain a category list.
D. Official CMMC Registry
❌Incorrect–No such registry exists; CMMC is a cybersecurity framework, not a CUI classification system.
National Archives (NARA) CUI Registry– The authoritative source forall federal agency CUI categories.
32 CFR 2002– Provides CUIpolicy guidancebut refers agencies to theOfficial CUI Registryfor classification.
Official References from CMMC 2.0 and Federal DocumentationFinal Verification and ConclusionThe correct answer isB. Official CUI Registry, as it is theonly official source listing all federal agencies' CUI indices and categories.