OBS_VALUE: <ul><li><a href=http://www.ecfr.gov/cgi-bin/text-idx?SID=1db4f3b488bddaa6291f9b93b3f994d7&mc=true&node=pt14.2.93&rgn=div5#sp14.2.93.s target=_blank>Aeronautics and Space(14 C.F.R. §93.215 (2017) )</a></li></ul>