To expand the question into the performance and legal envelope: I have tried for many years to get an official answer from my company on the legal question of gusty tailwind limits. No success yet. You have a 10 or 15kt tailwind legal limit and no option for the other rwy. The ATC wind is 13G25kts and it is a -15kt approved rwy. Can you land legally? Simple question; at least I thought so. No problem with the company answering the X-wind question, but this one has been filed in a black-hole. The performance dept says they would use all the gust for landing distance calculations, but that was not the question. Is it legal to land? Even the manufacturer says it is up to the airline, except the airline is keeping it secret. Can anyone help?