The manufacturer shall not modify or change the device approved without resubmission of the modified device for approval in the same manner as required for the original device. The commissioner reserves the right to inspect the manufacturing plant and any devices sold in the State of New York. In the event that it is determined that the devices approved have been modified and are no longer acceptable, the manufacturer will be notified of withdrawal of the approval and will no longer be permitted to sell snowmobiles in this State. All notifications of approval or disapproval will be accomplished by letter.