to move, Enter to open, Esc to close. Try 3.5.3, AC.L2-3.1.1, MFA or unmarked.

Critical Energy Infrastructure Information CEII

A CUI category in the Critical Infrastructure grouping of NARA's registry, CUI Specified, marked CUI//SP-CEII.

NARA's description

CUI Registry · Critical Energy Infrastructure Information

Critical energy infrastructure information means specific engineering, vulnerability, or detailed design information about proposed or existing critical infrastructure that: (i) Relates details about the production, generation, transportation, transmission, or distribution of energy; (ii) Could be useful to a person in planning an attack on critical infrastructure;... and (iii) Does not simply give the general location of the critical infrastructure.

Verbatim from the registry entry, which NARA last reviewed on May 7, 2025. Fetched 2026-09-08.

Markings

Category marking
CEII
Banner marking
CUI//SP-CEII

A banner reads CUI for Basic categories and CUI//SP-CEII for Specified ones, followed by any limited dissemination control such as NOFORN. How the marking rule works, verbatim from 32 CFR 2002.20.

Authorities

The law, regulation or Government-wide policy that makes this information CUI, and whether it does so as a Basic or a Specified authority.

Safeguarding or dissemination authorityBasic or SpecifiedBannerSanctions
18 CFR 388.113SpecifiedCUI//SP-CEII
10 CFR 1004.13SpecifiedCUI//SP-CEII

Source: https://www.archives.gov/cui/registry/category-detail/critical-energy-infrastructure-information.