One Lex Partners is a New York-based boutique law firm advising importers, exporters, financial institutions, and investors on U.S. trade regulation. Our lawyers have served at U.S. government agencies, in senior in-house positions, and at leading international firms.
The Firm
We focus on a defined area of practice: U.S. customs and import compliance, export controls under the EAR and ITAR, economic sanctions administered by OFAC, and foreign investment regimes (OISP and CFIUS). We work with companies of all sizes, from venture-backed startups to multinational corporations, on matters that range from day-to-day compliance counseling to enforcement defense and high-stakes transactional work.
Our model is built on direct, senior-attorney engagement. Clients work with the partner handling their matter rather than through layers of associates. This produces faster decisions, clearer advice, and better economics than conventional firm staffing.
Practice
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We advise importers on the regulatory regimes administered by U.S. Customs and Border Protection (CBP), including tariff classification under the HTSUS, customs valuation, country-of-origin analysis, free trade agreement qualification, Section 301, Section 232, and IEEPA tariff exposure, antidumping and countervailing duty matters, and forced-labor compliance under the UFLPA.
Areas of work:
Tariff classification and binding ruling requests
Customs valuation, including first sale and related-party pricing
Country of origin and substantial-transformation analysis
USMCA and other free trade agreement qualification
Section 301, Section 232, and IEEPA tariff strategy
Antidumping and countervailing duty compliance
UFLPA and forced-labor compliance
C-TPAT and other Trusted Trader programs
Prior disclosures and penalty mitigation
CBP audits and focused assessments
Court of International Trade litigation
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We counsel companies on the Export Administration Regulations administered by the Bureau of Industry and Security (BIS) and the International Traffic in Arms Regulations administered by the Directorate of Defense Trade Controls (DDTC), including controls on semiconductors, advanced computing, and other strategic technologies.
Areas of work:
Commodity jurisdiction and ECCN / USML classification
Export and reexport license applications
License-exception qualification
Deemed-export analysis and technology control plans
Encryption controls and self-classification reports
Entity List, Unverified List, and Military End-User List screening
Foreign Direct Product Rule analysis
ITAR registration, brokering, and licensing
Voluntary self-disclosures to BIS and DDTC
Internal investigations and administrative enforcement defense
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We represent clients in matters involving sanctions administered by the U.S. Department of the Treasury's Office of Foreign Assets Control (OFAC), including the Russia, Belarus, Iran, Cuba, Venezuela, China-related, North Korea, and Global Magnitsky programs, and secondary-sanctions exposure for non-U.S. persons.
Areas of work:
Transactional sanctions diligence and clearance
Specific license applications to OFAC
General License qualification analysis
50 Percent Rule and ownership analysis
Blocked-property reporting and rejected-transaction reports
Voluntary self-disclosures to OFAC
Sanctions provisions in commercial agreements
Internal investigations and enforcement defense
Sanctions risk assessments
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We design, assess, and remediate trade compliance programs benchmarked against current government guidance, including BIS export-compliance guidelines, OFAC's Framework for OFAC Compliance Commitments, and DOJ's Evaluation of Corporate Compliance Programs.
Areas of work:
Compliance program assessments and gap analyses
Written policies and standard operating procedures
Restricted-party screening vendor selection and configuration
Red-flag identification and escalation protocols
Anti-boycott compliance under 15 C.F.R. Part 760 and 26 U.S.C. § 999
Internal audits and compliance assessments
Training for legal, commercial, engineering, and operations teams
Integration with corporate ethics and compliance functions
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We work with importers and manufacturers on supply-chain design strategies to mitigate tariff exposure and reduce regulatory risk, including country-of-origin restructuring, first-sale valuation, foreign-trade zone strategies, and duty drawback.
Areas of work:
Country-of-origin and substantial-transformation planning
First-sale valuation analysis
Foreign-trade zones and bonded warehouses
Duty drawback (manufacturing, unused merchandise, rejected merchandise)
Tariff engineering through product modification and reclassification
Vendor diligence and qualification
Trade-compliance terms in supply and distribution agreements
Section 301 exclusion strategy and country-of-origin restructuring
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We advise strategic and financial buyers, sellers, and investors on trade-regulatory aspects of mergers, acquisitions, financings, and joint ventures, including diligence, risk allocation, post-closing integration, and coordination with CFIUS counsel.
Areas of work:
Customs, export controls, and sanctions diligence
Acquisition-driven voluntary self-disclosures
Risk allocation in transaction documents
License transfer, reissuance, and DDTC registration changes
OISP and CFIUS assessments
Post-closing integration and remediation
Coordination with CFIUS counsel
Investor diligence on trade-regulatory exposure
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We represent clients before U.S. Customs and Border Protection, the Bureau of Industry and Security, the Directorate of Defense Trade Controls, the Office of Foreign Assets Control, and the U.S. Department of Justice, in administrative proceedings, settlement negotiations, and litigation.
Areas of work:
CBP audits, penalty proceedings, and seizure cases
BIS administrative enforcement and charging letters
DDTC consent agreements and administrative proceedings
OFAC pre-penalty notices and enforcement matters
DOJ criminal and civil enforcement, including parallel proceedings
Court of International Trade and federal court litigation
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We assess and build corporate compliance programs aligned with current DOJ guidance, including anti-bribery and anti-corruption policies under the Foreign Corrupt Practices Act (FCPA) and analogous international regimes.
Areas of work:
Compliance program assessment and benchmarking against DOJ guidance
Codes of conduct and anti-bribery / anti-corruption policies
Gifts, hospitality, and political-activity policies
Internal investigations and self-disclosure analysis
Vendor and third-party due diligence
M&A successor-liability assessments
Compliance training
Strategic Affiliations
The firm maintains strategic affiliations that allow us to deliver integrated services on matters extending beyond legal counsel.
Sterling Accelerator, LLC. We work with Sterling Accelerator on go-to-market strategy and business-scaling engagements where clients require commercial as well as legal support.
Partners
Ruta Riley
Founder and managing partner with 17 years of experience in import, export, sanctions, and international trade matters.
Tammie G. Krauskopf
We partner with Tammie Krauskopf Trade Law, LLC. Tammie has over thirty years of experience in customs and international trade.
Michael Iagrossi
We partner with Sterling Accelerator, LLC to help customers interested in GTM and business scaling solutions.

