Each lot of tobacco delivered for sale at receiving stations and transferred to a conveyor system for unloading shall maintain a distance between adjacent lots of not less than 18 inches during the inspection process. The platform area used for examination with a conveyor system shall be a minimum of 4 × 4 feet. Any lots of tobacco displayed in a manner other than a conveyor system shall maintain a minimum clearance of 18 inches on all sides. If the tobacco is inspected or graded by the recipient, it shall be made available for mandatory inspection at the same time and location within the receiving station.