Q: Are there standards for replacing fuel lines?

I had my mechanic fix my fuel line 6 weeks ago as it was leaking... I noticed a strong gas smell today and a large puddle of gas under the car this morning. Since my mechanic isn't open on weekends- a friend who is a mechanic took a look at it. HE said he was shocked to see my fuel line was replaced by over 5 feet of rubber hose which also bends around the exhaust. he said this is very dangerous as well as illegal. said standards for fuel line that no more than 6 inches of rubber hose should be used. also where my mechanic cut the steel line... less than 2 inches away was a very large badly rusted area. THIS friend said any mechanic would of replaced the whole line instead of cutting where he did- as he said by where he did cut the line would of caused the rusted area to move and cause rust to fall off to start another leak. IS there truth to this? should I be questioning my mechanic and asking this to repaired at his cost??

My car has 187000 miles.
My car has an automatic transmission.