New York Laws
Article 4-A - Frozen Desserts
71-H - Vehicles Used for Transportation of Frozen Desserts.

ยง 71-h. Vehicles used for transportation of frozen desserts. All
vehicles used for the transportation and distribution of frozen desserts
shall be constructed of impervious material capable of being cleaned,
shall be kept clean and sanitary, shall be so operated as to protect
their contents from contamination, and shall have prominently displayed
thereon the name and address of the licensee who sells, offers or
exposes for sale, or holds with intent to sell, such frozen desserts.