For many grains, HTS subheadings distinguish between seed-quality and other grades, or between different processing states (e.g., husked vs. milled). Moisture content can affect whether a shipment meets the specification for a particular subheading and may also trigger quality-based admissibility concerns under USDA APHIS phytosanitary rules.

Certain oilseeds and grains originating from specific countries have been subject to Section 301 tariffs. The applicability depends on the precise HTS subheading and country of origin, so importers should verify current trade-remedy orders with CBP or a licensed customs broker before contracting.