I. In compliance with the rules of the department, a dealer may issue temporary plates furnished by the department for use of any vehicle, including mopeds, sold by it. Any such vehicle may be driven displaying temporary plates until the customary registration certificate and plates have been received by the owner but, except as provided in paragraph II, the vehicle shall not be driven under temporary plates for a period in excess of 20 days from the date of issuance by the dealer.
II. If the owner has a disability and requires additional time to equip the vehicle to accommodate his or her disability, the owner shall submit a request on a form provided by the department setting forth the type of modification that is being made to the vehicle, the business or other person making the modification, and the estimated completion time for the modification, and the director shall issue a new set of temporary plates reflecting a reasonable extension of the expiration date to enable the modifications to be completed.