In his draft:
Food trucks may not be located within 500 feet of a “brick and mortar” restaurant or other establishment that sells ready-made food for “on premise” consumption, either during or after regular business hours without “brick and mortar” restaurants’ prior written approval.
When not in operation, all mobile food vendors must leave the site and return to their commissary and/or storage facility. They shall not be left unattended.
This should deal with the concerns of the downtown restaurant owners.
Here is his proposal: Food_Truck_Ordinance_11.15.13.