Rules for siting a windsock

The subject is the location of a windsock at a US airport. I’m trying to learn how far from buildings it has to be. Google seems uncharacteristically unhelpful.

Anyone know the rules here?

Does this help at all? (.pdf)

I didn’t see placement there. Maybe something from the search page?

From what Johnny L.A. cited, here is the best I could find:

Taken from here.

I have to ask out of curiosity: why are you trying to figure this out?