Which of the following certificates must be displayed at the inspection station?

The requirement to display a certificate of appointment at the inspection station is essential because it serves as official documentation that the station is authorized to perform inspections. This certificate indicates that the inspection station meets the regulatory standards set by the state and has been granted permission to conduct vehicle inspections.

Having the certificate prominently displayed helps ensure transparency for customers and regulatory authorities alike. It reassures vehicle owners that they are receiving services from a certified facility that is compliant with state laws. This documentation is important for maintaining trust and accountability within the vehicle inspection process.

While the other certificates mentioned may be relevant in different contexts of vehicle inspections—such as showing compliance with safety regulations or technician qualifications—they do not fulfill the specific requirement to establish the station’s authority to conduct inspections. Thus, the certificate of appointment is the critical document that must be displayed at the inspection site.