To allow for safety regulation of vehicles that are modified to increase seating capacity, and for other purposes.

Limousine Safety Modernization Act This bill modifies the definition of "manufacturer" in motor vehicle safety provisions of federal transportation law to include a person who alters a motor vehicle that has already been purchased by the first purchaser by increasing the wheelbase of the vehicle so that it has increased seating capacity (e.g., a limousine manufacturer). A "first purchaser" means the first purchaser of a motor vehicle or motor vehicle equipment other than for resale.