Export the full US Harmonized Tariff Schedule (HTS) dataset in JSON, CSV, or XLSX via the USITC public REST export endpoint

Steps

1. Determine the HTS number range to export (use 0101 to 9999 to capture the full schedule) and confirm the current HTS release/revision you need.
2. Call GET https://hts.usitc.gov/reststop/exportList with query params from, to, and format (JSON, CSV, or XLSX); add styles=true to include formatting/indentation metadata.
3. For JSON output, parse the returned array of heading/subheading records including HTS number, indent level, description, units of quantity, and duty rate columns (general, special, column 2).
4. If only a specific chapter or heading range is needed, narrow the from/to parameters instead of pulling the full file to reduce payload size.
5. Re-run the export after each numbered HTS revision is published and diff against the prior pull to detect rate or classification changes.
6. Store the release identifier (e.g., a specific year's HTS Basic edition) alongside the export so downstream consumers know which revision the data reflects.