What is the consensus on entryways from an underground parking garage into the building? Would signage need to be posted at the doors into the building from the garage area? What about level 1 and level 2 entrances into an elevator lobby?

A second question regards loading docks. What if the overhead door is way, way beyond 25 from the public sidewalk? Contractors and vendors have to drive past automatic doors to get into the loading dock area, so technically there are two sets of automatic doors to get to the actual building entrance. Does signage need to specify no smoking within 25 feet anywhere in this circumstance?