9902.15.63 - Air conditioning machines, each incorporating a refrigerating unit, mounted on wheels or castors, rated at less than 3.52 kW per hour (provided for in 8415.82.01)

This HTS category, 9902.15.63, specifically covers portable air conditioning units designed for domestic or personal use. These units are characterized by their self-contained refrigerating systems and mobility, typically achieved through integrated wheels or castors. A key defining feature is their cooling capacity, which must be rated at less than 3.52 kilowatts per hour. This classification is primarily intended for temporary or special tariff provisions.

Unlike the broad range of goods found in the main Harmonized System chapters (such as Chapter 84 for machinery), this Chapter 99 category is a specialized provision. Its siblings are other temporary or special classification numbers, each addressing unique situations like trade agreement impacts or specific import restrictions. Therefore, this category does not directly compete with classifications for general machinery or appliances that are not subject to these specific provisional rules. Its existence is contingent upon the specific trade policies or temporary legislation in effect.

As a leaf node, HTS 9902.15.63 has no further subdivisions. This means that all units meeting the described physical and performance criteria, and falling under the scope of Chapter 99's special provisions, will be classified directly under this code. The "provided for in 8415.82.01" parenthetical note indicates that the underlying tariff classification for these machines, when not subject to the Chapter 99 provision, would be found within Heading 8415, specifically covering air conditioning machines with a refrigerating unit, but not excluding portable wheeled units.