What constitutes unlawful installation of a tracking device on another's vehicle?

The unlawful installation of a tracking device on someone else's vehicle is defined primarily by the absence of consent from the vehicle owner. When an individual installs a tracking device knowingly without the owner's consent, it constitutes a violation of privacy and personal rights. Consent is a fundamental component in determining the legality of such actions. The law recognizes that individuals have the right to control who has access to their property, including their personal vehicles.

In contrast, options that include installation with the owner's consent or for lawful purposes fall outside the realm of unlawful activity. Adequate cause, while a legal consideration in some contexts, does not inherently justify the installation of a tracking device without consent. Thus, the focus is on the act of knowingly proceeding without permission, which establishes the illegality of the action.