Semi-Milled or Wholly Milled Rice

Parboiled rice undergoes a steam-pressure treatment before milling that alters the grain's translucency and starch structure. Customs may request a mill certificate or laboratory report confirming parboiling treatment, since parboiled long-grain (1006301020) and non-parboiled long-grain (1006309061) carry separate tariff lines with potentially different in-quota duty rates.

The US rice TRQ allocates a fixed in-quota volume at a lower duty rate; imports above that threshold face a significantly higher over-quota rate. Importers should monitor USDA's TRQ fill data and secure quota certificates early in the marketing year, particularly for high-demand aromatic varieties where quota can fill quickly.