What each regime actually controls
ITAR controls the export and re-export of defense articles and defense services listed on the United States Munitions List (USML). The technical data itself — drawings, specs, software source — is regulated; access by a foreign person (even on U.S. soil) is an export. Penalties: up to $1M per civil violation, $1M and 20 years per criminal violation.
CUI is a handling category for unclassified information that requires safeguarding under federal law, regulation, or government-wide policy. It's a marking and protection regime, not an export-control regime. CUI obligations attach via contract clauses (DFARS 7012, FAR CUI clause when it lands).
The overlap: CUI//SP-EXPT
- The CUI Registry includes Export Controlled as a specified category (CUI//SP-EXPT).
- Almost all ITAR technical data is CUI//SP-EXPT when handled by a federal contractor.
- Inside a CMMC Level 2 enclave, you're already protecting it from an information-security standpoint — encryption, access control, audit, incident reporting.
- CMMC compliance does not satisfy ITAR. ITAR has its own registration, licensing, and foreign-person access controls that CMMC doesn't touch.
Where CMMC stops and ITAR keeps going
CMMC Level 2 + DFARS 7012 will get you to:
- FIPS-validated encryption at rest and in transit
- Access control, MFA, audit logging
- 72-hour incident reporting to DC3
- Configuration management and vulnerability scanning
ITAR additionally requires:
- DDTC registration (every U.S. manufacturer or exporter of defense articles)
- Export licenses or exemptions for any release to a foreign person
- Foreign-person access controls in the actual environment — your IT staff, your cloud provider's support team, your offshore developers
- End-to-end encryption with U.S.-controlled keys if storing ITAR data in commercial cloud (per the State Department's 2020 carve-out)
- Recordkeeping for five years of every export
Practical architecture: dual-purpose enclave
The cleanest pattern is a single enclave designed for ITAR (most restrictive) that automatically satisfies CUI/CMMC by being a superset. That means: U.S.-only personnel access (enforced technically, not just policy), GovCloud or similar U.S.-sovereign cloud region, customer-controlled encryption keys, hardware tokens for MFA, and an evidence collection pipeline that captures both ITAR access logs and CMMC audit logs in the same store. Trying to bolt ITAR onto a commercial CMMC environment after the fact is where most programs blow up the budget.