{ "summary": "In the United States tariff, line 2521.00.00.00 covers limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 2521.00 in heading 25.21 (chapter 25).", "updatedAt": "2026-10-09", "facts": [ { "label": "Tariff line", "value": "2521.00.00.00", "source": "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false" }, { "label": "Covers", "value": "Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement", "source": "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false" }, { "label": "Duty (MFN)", "value": "Free", "source": "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false" }, { "label": "Additional duties", "value": "None recorded", "source": null }, { "label": "Restrictions", "value": "None recorded", "source": null }, { "label": "Tariff", "value": "United States", "source": "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false", "url": "https://border.bot/countries/united-states" }, { "label": "HS subheading", "value": "2521.00", "source": null, "url": "https://border.bot/hs-codes/252100" } ], "faq": [ { "question": "What does tariff line 2521.00.00.00 cover in the United States tariff?", "answer": "In the United States tariff, line 2521.00.00.00 covers limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement." }, { "question": "What is the general (MFN) duty on 2521.00.00.00 in the United States?", "answer": "Goods under this line enter free of general (MFN) duty." } ], "sections": [ { "id": "covers", "title": "What this line covers", "text": [ "In the United States tariff, line 2521.00.00.00 covers limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement.", "Its legal text is “Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement”." ] }, { "id": "structure", "title": "How it is structured", "text": [ "It falls under HS subheading 2521.00 in heading 25.21 (chapter 25). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff." ] }, { "id": "duty", "title": "Duty", "text": [ "Goods under this line enter free of general (MFN) duty." ] }, { "id": "other-countries", "title": "In other countries", "text": [ "No other national tariff on border.bot has live lines under 2521.00 yet." ] }, { "id": "sources", "title": "Sources and updates", "text": [ "The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.", "The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.", "The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.", "This page was last updated on 9 October 2026.", "Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling." ] } ], "data": { "type": "country-line", "country": { "code": "US", "name": "United States", "slug": "united-states" }, "schedule": { "code": "US", "name": "United States", "slug": "united-states" }, "borrowed": false, "localTaxes": [], "localDeminimis": [], "ratesLive": true, "provenance": [ { "dataset": "US:hs", "country": "US", "kind": "hs", "seq": 1, "version": "2026HTSRev21", "liveAt": "2026-10-09T21:15:50.043Z", "origin": "source", "sourceUrls": [ "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false" ] }, { "dataset": "US:rates", "country": "US", "kind": "rates", "seq": 1, "version": "2026HTSRev21", "liveAt": "2026-10-09T21:15:36.287Z", "origin": "source", "sourceUrls": [ "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false" ] }, { "dataset": "US:programmes", "country": "US", "kind": "programmes", "seq": 1, "version": "2026HTSRev21", "liveAt": "2026-10-09T21:15:58.040Z", "origin": "source", "sourceUrls": [ "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false" ] } ], "dateModified": "2026-10-09T21:15:58.040Z", "chapter": { "code": "25", "description": "Salt; sulphur; earths and stone; plastering materials, lime and cement" }, "heading": { "code": "2521", "description": "Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement" }, "subheading": { "code": "252100", "description": "Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement" }, "line": { "code": "2521000000", "description": "Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement", "levels": [], "english": null, "keywords": [], "lang": "en", "general": { "code": "2521000000", "dutyText": "Free", "startDate": null, "endDate": null, "unit": null }, "preferences": [], "measures": [], "restrictions": [] }, "siblings": [], "siblingsTotal": 0, "previous": { "code": "2520200000", "description": "Plasters", "indexable": true }, "next": { "code": "2522100000", "description": "Quicklime", "indexable": true }, "otherSchedules": [], "seo": { "canonicalPath": "/countries/united-states/hs-codes/2521000000", "robots": "index", "sitemap": true, "reasons": [ "1 national lines" ] } }, "pagination": { "page": 1, "pages": 1, "size": 100, "total": 0, "prev": null, "next": null }, "previous": "https://border.bot/countries/united-states/hs-codes/2520200000", "next": "https://border.bot/countries/united-states/hs-codes/2522100000", "links": { "self": "https://border.bot/countries/united-states/hs-codes/2521000000.json", "html": "https://border.bot/countries/united-states/hs-codes/2521000000", "canonical": "https://border.bot/countries/united-states/hs-codes/2521000000", "markdown": "https://border.bot/countries/united-states/hs-codes/2521000000.md", "tools": { "calculator": "https://border.bot/tools/landed-cost-calculator", "classifier": "https://border.bot/tools/hs-code-classifier", "api": "https://api.border.bot/v1" } }, "code": "2521000000", "attribution": "border.bot tariff reference (border.bot), compiled from the official publishers named on each page.", "terms": "https://border.bot/legal/terms", "notice": "Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.", "catalogVersion": "08bc53aa" }