15 CFR § 4a.5 - Duration of classification.
(a) Information shall remain classified no longer than ten years from the date of its original classification, unless, in accordance with section 1.5(b) of E.O. 13526, the original classification authority otherwise determines that the sensitivity of the information requires that it be marked for declassification for up to 25 years from the date of the original decision.
(b) For Department of Commerce originally classified information marked for an indefinite duration which contains incomplete declassification instructions, or lacks them entirely:
(2) if the standards for classification under E.O. 13526 are met, the information shall be declassified after 10 years from the date of the original classification, unless the original classification authority determines that the sensitivity of the information requires that it remain classified for up to 25 years from the date of the original classification, as provided in section 1.5.(b) of E.O. 13526.
The following state regulations pages link to this page.