In State v. Bailey (1978) 120 Ariz. 399 586 P.2d 648 the defendant, driving a vehicle with Kansas license plates, approached the Arizona border after passing signs indicating that a checkpoint was ahead. A uniformed plant quarantine inspector explained that she was conducting an agricultural inspection for California and Arizona and requested that the vehicle trunk be opened. The driver testified that he complied because he thought that he had no alternative. Inside the trunk was marijuana. The inspector allowed the defendant to pass through and reported the matter to the police. These are the same facts as before us. The court rejected the defendant's challenge of the agricultural inspection, finding it not violative of the Fourth Amendment.