Installing partitions in cars requires what type of alteration?

Installing partitions in cars is classified as a major alteration because it significantly changes the vehicle's structure and design. This modification can affect various components, including safety features, layout, and overall functionality of the vehicle. Major alterations typically require more extensive planning, engineering assessments, and possible compliance checks to ensure that the alteration meets safety regulations and standards.

Partitions can alter the way in which occupants interact within the vehicle, change the vehicle's center of gravity, and potentially impact how the vehicle performs in terms of handling and safety dynamics. Hence, categorizing this type of adjustment as a major alteration is appropriate due to its significant implications on the vehicle's operation and passenger safety.