What requirements, among others, must a passenger car meet to be classified as a “Shared used vehicle” and be able to carry badge of the image?

In Spain, for a passenger car to be classified as a “Vehículo de Uso Compartido” (Shared Use Vehicle) and be eligible to display the corresponding badge, it must comply with specific mobility and car-sharing regulations.
The key requirements include:
Rental Without a Driver – The vehicle must be available for self-service rental, meaning users drive it themselves without a chauffeur.
Intensive Use – The vehicle must be used frequently and by many different users.
Undetermined Number of Users – The vehicle must be accessible to any registered user within a defined service area, typically through a car-sharing platform.
This classification aligns with the operational models of free-floating and station-based car-sharing services such as Zity, Free2Move, and Share Now in Spain.