No clear error where the court reviews a website discussed in briefing and uses the content in coming to a decision, as the other party had to carry the burden, and the proof introduced was minimal.
http://media.ca7.uscourts.gov/cgi-bin/rssExec.pl?Submit=Display&Path=Y2018/D06-21/C:18-1193:J:Barrett:aut:T:fnOp:N:2174452:S:0
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.