Seems like the climber isn't tethered to a secure line all the time, only occasionally. Like he says, "most climb without safety line" or something.
I don't know much about laws governing work place security but that seems a bit lax. Heights is one thing but having uncessary dangers is another. I've worked in high places when I worked at this factory, we always took safety seriously because it made sense to take it seriously. If you die or even get injured because of an accident it's a case of finding out whose fault it was, the employers or yours. If you ignored safely guidelines, it's your fault. If there was inadequate safety guidelines or no safety structures in place, it's the employers fault.
But then again I guess the rules are a bit more lax in the States.
Another high place - video, the top of Burj Dubai.
[youtube]http://www.youtube.com/watch?v=oWVLzVhnYE0[/youtube]