Within the VM, V, MC, C, and I Districts, all loading/unloading spaces shall be paved. Suitable paving material shall be asphalt or concrete. Within the OS, LC, RR, and AP Districts, loading/unloading areas shall be provided with a durable and dust-free surface. Suitable paving material includes asphalt or concrete paving, compacted stone or millings, or other similar material that performs in a durable and dust-free manner.