Without prior written authorization from the Railroad, Industry must not construct, maintain, place or allow the construction or placement of, any structure or object (including, without limitation, platforms, fences, vehicles, equipment, and when open or closed, gates, doors and windows) closer to the Industry Track than the standard clearance requirements of Railroad. The standard clearances of Railroad are (a) horizontally, nine feet (9’) from the centerline of the Track, and increased one and one-half inches (1-1/2’’) for each degree of curvature of the Track, and (b) vertically, twenty-three feet (23’) above the top of the rail of the Track. Any moveable equipment, including, but not limited to, dock plates and loading or unloading spouts or equipment, that impairs the standard clearance requirements may be used only when the train is stationary, and when not in use must be securely stored or fastened so as not to violate clearance requirements.