9902.15.50 - Used fuel, lubricating or cooling medium pumps designed for internal combustion piston engines (provided for in subheading 8413.30.10 or 8413.30.90)

This HTS category, 9902.15.50, specifically addresses used fuel, lubricating, or cooling medium pumps designed for internal combustion piston engines. These are typically components that have been previously utilized in the operation of such engines and are now being imported or exported. The classification is contingent upon the pump's original purpose and its design for use within the specified engine types, referencing its inclusion under the more general headings of subheading 8413.30.10 or 8413.30.90.

While this category falls within the broader framework of Chapter 99, which deals with temporary legislation and trade agreement modifications, its specific focus on used engine pumps distinguishes it from the vast array of other goods classified under various Chapters of the Harmonized Tariff Schedule. For instance, it would not encompass new pumps, pumps for other types of machinery, or other used engine parts not specifically identified as fuel, lubricating, or cooling pumps. The "used" nature is a critical factor, potentially subject to specific import or export regulations under the temporary provisions of Chapter 99.

As a leaf node, this classification does not have further subcategories. Therefore, the primary classification considerations revolve around confirming the item is indeed a pump, that it is used, and that it is designed for internal combustion piston engines, aligning with the detailed description provided. Importers and exporters should ensure documentation clearly reflects these characteristics to meet compliance requirements under the stated temporary legislation.