Idaho Code § 67-2917
Wherever hazardous waste, as defined in section 39-4403, Idaho Code, is being transported within the state, within the state to without the state, or from without the state to within the state, the operator or owner of the motor vehicle or trailer, as defined in chapter 1, title 49, Idaho Code, transporting hazardous waste is hereby required to stop at such ports of entry or checking stations and submit to inspection or weighing for compliance with the laws of the state of Idaho. Additionally, such owner or operator of the motor vehicle or trailer transporting hazardous waste is hereby required and directed to allow employees of the department of environmental quality, authorized Idaho transportation department employees or the state police or any peace officer on duty to inspect and review all manifests and bills of lading to ensure that such hazardous waste is being shipped in a manner which will not endanger the health, welfare or safety of the citizens of the state of Idaho and is being shipped in compliance with the laws of the state of Idaho and any rules promulgated pursuant thereto.
Idaho Code § 67-2917