Not sure how many fence contractors follow Texas Swimming Pool regulations with regard to fences.
Also have to consider what the homeowner told the contractor they wanted. Theres always YES guys out there willing to take your money & do the wrong thing... just becuase the homeowner said to do it.
I deal with controlled fires in homes every day...you would be amazed at what some homeowners want that would burn a house down & i have to tell them NO ... what you want to do will cause a fire hazard. But there are guys out there that would do it.... becuase "thats what you wanted".