What is NOT permitted under the Carroll Doctrine?

The Carroll Doctrine, stemming from the case Carroll v. United States, establishes that law enforcement officers may search a vehicle without a warrant if they have probable cause to believe it contains contraband or evidence of a crime. This principle is rooted in the inherent mobility of vehicles and the diminished expectation of privacy in them.

The option related to entering onto protected areas to seize or search is indeed not permitted under the Carroll Doctrine. This doctrine only applies to vehicles that are readily mobile and does not extend to areas that are generally protected from such searches, like a home or other non-mobile locations unless other legal justifications are present.

In contrast, searching a vehicle if it contains contraband, searching the passenger compartment, and impounding the vehicle for further inspection are all permissible actions under the Carroll Doctrine, as these actions align with the established standards of probable cause and the need for effective law enforcement. The focus of the doctrine is specifically on the vehicle itself and the immediate area where evidence can be located, reinforcing the limitations and scope of searches related to vehicles as opposed to private residences or protected areas.