8701.23.00 - With both spark-ignition internal combustion piston engine and electric motor as motors for propulsion

This HTS category, 8701.23.00, specifically classifies road tractors designed for towing semi-trailers that are powered by a hybrid system. These vehicles utilize both a spark-ignition internal combustion piston engine (like those found in gasoline-powered vehicles) and an electric motor as their primary means of propulsion. The combination of these two power sources defines this particular classification.

It is crucial to distinguish this category from its siblings based on the type of internal combustion engine and the presence of an electric motor. For instance, 8701.21.00 covers tractors with only a compression-ignition engine (diesel or semi-diesel), while 8701.22.00 includes those with a compression-ignition engine *and* an electric motor. This category, 8701.23.00, is unique in specifying a spark-ignition engine in combination with an electric motor. Tractors powered solely by an electric motor fall under 8701.24.00, and any other road tractors not fitting these descriptions would be classified as "Other" under 8701.29.00.

Further subdivisions exist within this category based on the condition of the vehicle. The primary subcategory is for new tractors falling under the description of 8701.23.00, indicating vehicles that have not been previously sold or operated. A secondary subcategory, 8701.23.00.80, is designated for used tractors that meet the same propulsion system criteria. This distinction is important for import duties and regulations.