Photo of Sibilla Grenon

Sibilla Grenon is an associate in Crowell & Moring’s International Trade Group.

Before joining Crowell, Sibilla clerked for the Honorable Timothy M. Reif of the Court of International Trade, where she assisted Judge Reif in cases related to antidumping and countervailing duties, customs, and matters arising from the Court’s residual jurisdiction. Sibilla also assisted Judge Reif in the adjudication of cases before the Southern District of New York, notably in areas of trade secret and copyright law. Prior to her clerkship, Sibilla was an associate in the litigation group of a law firm where she represented clients on compliance issues concerning privacy and data security for large corporations in accordance with state, federal, and international privacy regulations (GDPR, CCPA, CPRA, TCPA, BIPA, and GLBA) and employment matters.

Sibilla is a Rising Leader with the Aspen Strategy Group, a program that cultivates the next generation of rising leaders in national security and foreign policy.

As a law student, Sibilla served as the articles editor for the Georgetown Journal of International Law, a fellow at the Institute of International Economic Law, and was a member of Georgetown’s francophone moot court team of the Concours d’Arbitrage International de Paris.

On September 23, 2025, the U.S. Court of International Trade (CIT) issued an opinion vacating and remanding U.S. Customs and Border Protection’s forced labor Finding against Kingtom Aluminio S.R.L., a Dominican Republic-based aluminum extruder. The court found that CBP’s determination, which prohibited the entry of Kingtom’s aluminum extrusions under Section 307 of the Tariff Act

Modifications to Scope

On Friday, September 5th, 2025, President Trump announced via Executive Order a large number of modifications to the scope of the reciprocal tariffs, which were initially announced on April 2, 2025, under the International Emergency Economic Powers Act (IEEPA). The Executive Order released on September 5th modified the scope of the

On July 22, 2025, the U.S. Court of Appeals for the D.C. Circuit dismissed an action brought by eight Malian citizens against seven U.S. cocoa importers (Cargill, Nestlé, Mondelēz, Hershey, Olam, Barry Callebaut, and Mars) for forming and operating a cocoa supply chain to provide themselves with cheap cocoa harvested by child labor.  The action

The Court of International Trade (“CIT”) and the District Court for the District of Columbia (“DDC”) both issued decisions enjoining the Trump IEEPA tariffs.  In both venues, the government appealed the courts’ decisions, and both orders are currently stayed. The DDC stayed its own preliminary injunction pending appeal; the U.S. Court

On May 29, a day after the U.S. Court of International Trade (“CIT”) issued summary judgment in V.O.S. v. Trump blocking the IEEPA tariffs, the District Court for the District of Columbia (“DDC”) exercised jurisdiction in Learning Resources, Inc., et. al., v. Donald J. Trump, et. al. (25-cv-1248), denying the government’s motion to transfer the

On May 28, 2025, the Court of International Trade granted summary judgment in V.O.S. Selections, Inc. et al v. Donald J. Trump Case No. 25-cv-66, ordering that all the executive orders imposing tariffs on the basis of IEEPA (Executive Order 14193, Executive Order 14194, Executive Order 14195, Executive Order 14257), were declared to be invalid

U.S. Customs and Border Protection (CBP) issued a notice of proposed rulemaking concerning the de minimis exemption under 19 U.S.C. § 1321 (Section 321).  Currently, the de minimis exemption allows goods with an aggregate value under $800 to enter the U.S. duty-free and via an expedited process.  The proposed amendment is intended to stem the

Senate Finance Chairman Ron Wyden (D-OR) recently introduced a bill that formalizes the legislation he released in August, the Fighting Illicit Goods, Helping Trustworthy Importers, and Netting Gains (FIGHTING) for America Act. The FIGHTING for America Act would remove de minimis treatment for goods impacted by the Generalized System of Preferences (GSP) program, as