OBS_VALUE: For an official English translation of the Foreign Business Act B.E.2542 (1999), please see https://www.dbd.go.th/dbdweb_en/download/pdf_law/FOREIGN_BUSINESS_ACT_BE2542/act/1FBA-FINAL[1].pdfFor an unofficial English translation of the Air Navigation Act B.E.2497 (1954), please seehttps://www.caat.or.th/en/archives/56519