The regulations governing the CFIUS review process are codified at 31 C.F.R. Part 800. The regulations were wholly revised by the final rule published at 73 Fed. Reg. 70702 (Nov. 21, 2008), which became effective on December 22, 2008. All voluntary notices filed on or after the effective date must comply with the information requirements at § 800.402 of the new regulations.
With respect to certain determinations in a small number of cases, as provided at §800.103 of the new regulations, the old regulations will continue to apply.