How are ornamental lamps defined in vehicle regulations?

Ornamental lamps are defined in vehicle regulations as lamps that are not required and are not specifically located for safety. This means they are designed more for aesthetic purposes rather than functional safety requirements. Such lamps do not contribute to the essential operational aspects of a vehicle, such as visibility or signaling during driving.

In contrast, the other choices relate to lamps that serve specific safety functions or operational needs. For example, lamps required for safety inspections are mandated by law to ensure that vehicles meet certain safety standards. Emergency situation lamps serve crucial roles in notifying other drivers of a vehicle's status in urgent scenarios. Similarly, lamps aimed at enhancing daytime visibility are focused on functional rather than decorative illumination. Thus, ornamental lamps are distinctly separated from these categories as they primarily serve visual appeal rather than safety functions.