8703.70.00 - Other vehicles, with both compression-ignition internal combustion piston engine (diesel or semi-diesel) and electric motor as motors for propulsion, capable of being charged by plugging to external source of electric power:

This HTS category, 8703.70.00, classifies a specific type of hybrid vehicle designed for passenger transport. These vehicles are characterized by having two distinct propulsion systems: a compression-ignition internal combustion engine (commonly known as diesel or semi-diesel) and an electric motor. Crucially, these vehicles possess the capability to recharge their electric power source by connecting to an external electrical outlet, a feature that distinguishes them from other hybrid configurations. This category falls under motor cars and other vehicles principally designed for carrying persons.

To differentiate this category from its siblings, it's important to note its specific combination of engine types and charging capability. Unlike vehicles with only spark-ignition engines or only compression-ignition engines, or those hybrids that cannot be plugged in for charging, 8703.70.00 exclusively covers plug-in diesel-electric hybrids. This is in contrast to sibling categories like 8703.40.00, which covers plug-in petrol-electric hybrids, and 8703.50.00, which covers non-plug-in diesel-electric hybrids.

The subcategories within 8703.70.00 provide further refinement based on the engine's cylinder capacity. These subdivisions, such as "Of a cylinder capacity not exceeding 1,500 cc," "Of a cylinder capacity exceeding 1,500 cc but not exceeding 2,500 cc," and "Of a cylinder capacity exceeding 2,500 cc," allow for more precise classification and are often relevant for tariff rate determination or statistical tracking purposes.