OBS_VALUE: <ul><li><a href=https://www.mevzuat.gov.tr/mevzuat?MevzuatNo=2920&MevzuatTur=1&MevzuatTertip=5 target=_blank>Turkish Civil Aviation Law(TÜRK SİVİL HAVACILIK KANUNU, nr. 2920, adopted on 14 October 1983, Art. 18 )</a></li></ul>