(8) "Commercial motor vehicle" means any motor vehicle or motor vehicle combination used on the streets or highways, which:
(a) Has a gross vehicle weight rating of 26,001 pounds or more;
(b) Is designed to transport more than 15 persons, including the driver; or
(c) Is transporting hazardous materials and is required to be placarded in accordance with Title 49 C.F.R. part 172, subpart F.
A vehicle that occasionally transports personal property to and from a closed-course motorsport facility, as defined in s. 549.09(1)(a), is not a commercial motor vehicle if the use is not for profit and corporate sponsorship is not involved. As used in this subsection, the term "corporate sponsorship" means a payment, donation, gratuity, in-kind service, or other benefit provided to or derived by a person in relation to the underlying activity, other than the display of product or corporate names, logos, or other graphic information on the property being transported.