(a) Prohibition. Commercial carriers shall not permit anyone to consume food or beverages while traveling in buses and taxis.

(b) Sign Required. Each commercial carrier operating a bus or taxi shall conspicuously post a sign in each vehicle notifying passengers that eating and drinking is prohibited, which shall contain the following minimum language: “By Order of the Commerce Commission, no eating or drinking is allowed inside this vehicle.”

(c) Containers. Each commercial carrier operating a bus shall provide a litter disposal container for public use in each vehicle.