Sources & resources

Primary government and standards sources first. Secondary sources are used for discovery or context, not as a substitute for the controlling document.

U.S. Census Bureau — International Trade API

Monthly import values and origin-country data powering the trade dataset. Official source ↗

U.S. Customs and Border Protection — CROSS

Binding and headquarters rulings used to connect actual sauna products to tariff classifications and origin analysis. Official source ↗

U.S. International Trade Commission — HTSUS

Current tariff schedule, legal notes, base duty rates and Chapter 99 provisions. Current HTSUS ↗

Federal Register

Presidential proclamations, agency notices and other official material affecting trade measures and effective dates. Federal Register ↗

U.S. Trade Representative

Section 301 actions, modifications and product-exclusion materials. USTR tariff actions ↗

International Trade Administration — AD/CVD

Scope and case information for antidumping and countervailing-duty orders. ITA AD/CVD ↗

UL Solutions standards catalog

Safety standards relevant to sauna heating appliances and infrared cabins, including UL 60335-2-53, should be checked against the current edition. UL Standards ↗