Certain Monomers and Oligomers from the Republic of Korea: Final Affirmative Determination of Sales at Less Than Fair Value and Final Affirmative Determination of Critical Circumstances

Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Department of Commerce International Trade Administration [A-580-921] AGENCY: Enforcement and Compliance, International Trade Administration, Department of Commerce. SUMMARY: The U.S. Department of Commerce (Commerce) determines that certain monomers and oligomers (monomers and oligomers) from the Republic of Korea (Korea) are being, or are likely to be, sold in the United States at less than fair value (LTFV). The period of investigation (POI) is January 1, 2024, through December 31, 2024. DATES: Applicable May 27, 2026. FOR FURTHER INFORMATION CONTACT: Peter Shaw or Sun Cho, AD/CVD Operations, Office V, Enforcement and Compliance, International Trade Administration, U.S. Department of Commerce, 1401 Constitution Avenue NW, Washington, DC 20230; telephone: (202) 482-6458 or (202) 482-0697. SUPPLEMENTARY INFORMATION: Background On January 5, 2026, Commerce published the Preliminary Determination in this investigation and postponed the final determination to no later than 135 days after the date of publication of the Preliminary Determination. [ 1 ] Accordingly, the deadline for this final determination is now May 20, 2026. We invited interested parties to comment on the Preliminary Determination. [ 2 ] On February 6, 2026, Commerce published the Amended Preliminary Determination in this investigation. [ 3 ] For a complete description of the events that occurred since the Preliminary Determination, see the Issues and Decision Memorandum. [ 4 ] The Issues and Decision Memorandu…