What actions make it unlawful for an owner or operator regarding vehicle registration plates?

Failing to clean the registration plate for visibility is indeed unlawful because it directly impacts the ability of law enforcement and automated systems to read the plate effectively. State regulations typically require that vehicle registration plates be kept in a condition that allows for clear visibility and identification. If a registration plate is obscured by dirt, grime, or any other substance, it can hinder law enforcement's ability to identify the vehicle during patrols or during checks, potentially leading to a failure to comply with registration laws.

In this context, maintaining the visibility of registration plates is essential for compliance with motor vehicle laws, as it ensures that law enforcement can fulfill their duties to monitor and enforce vehicle registration requirements. Keeping plates clean also reflects responsible vehicle ownership and contributes to overall roadway safety and regulation adherence.

The other options present actions that have legal implications as well, but the clarity of the registration plate directly links to the ability to enforce vehicle registration laws effectively.