Each applicant for a Class I peddler's license who desires to engage in the business of peddling oil, solely, shall so state in his application, and shall specify the number of vehicles he desires or intends to employ in and about such business, and such application shall be accompanied by a certificate from the Commissioner of Public Works certifying that each vehicle to be used by such oil peddler in and about his business is equipped and provided with drip pans or other devices which will effectual) prevent the spilling or dripping upon the pavement or street of any of the oil or products thereof to be conveyed in such vehicle, and that such drip pans or other devices are of a type approved by the said Commissioner.
Vehicles used for conveying oil or other flammable liquids shall not be used for the conveying of ice or any article of food or food products.