31 C.F.R. § 589.802
Any action that the Secretary of the Treasury is authorized to take pursuant to Executive Order (E.O.) 13660 of March 6, 2014, E.O. 13661 of March 16, 2014, E.O. 13662 of March 20, 2014, E.O. 13685 of December 19, 2014, E.O. 13849 of September 20, 2018, and any further Executive orders relating to the national emergency declared in E.O. 13660, and any action that the Secretary of the Treasury is authorized to take pursuant to Presidential Memorandum of September 29, 2017: Delegation of Certain Functions and Authorities under the Countering America's Adversaries Through Sanctions Act of 2017, the Ukraine Freedom Support Act of 2014, and the Support for the Sovereignty, Integrity, Democracy, and Economic Stability of Ukraine Act of 2014, may be taken by the Director of OFAC or by any other person to whom the Secretary of the Treasury has delegated authority so to act.
31 C.F.R. §589.802