Any regularly employed and salaried police officer or deputy sheriff, or any reserve police officer or reserve deputy sheriff listed in Section 830.6 of the Penal Code, having reasonable cause to believe that any vehicle or combination of vehicles is not equipped as required by this code or is in any unsafe condition as to endanger any person, may require the driver to stop and submit the vehicle or combination of vehicles to an inspection and those tests as may be appropriate to determine the safety to persons and compliance with the code.