Import Administration
In Shell Pistachios from Iran (A-507-502)

Scope Description:

The product covered by this order is raw, in-shell pistachio nuts from which the hulls have been removed, leaving the inner hard shells and edible meats, from Iran. This merchandise is currently classifiable under item 0802.50.20.00 and 0802.51.00.00 of the Harmonized Tariff Schedule of the United States (HTSUS). Although the HTSUS subheadings are provided for convenience and customs purposes, our written description of the scope of this proceeding is dispositive.

Source: 51 FR 25922 (July 17, 1986). The HTS did not exist at the time the order went into effect.
Note that HTSUS numbers are subject to change.