OBS_VALUE: <ul><li><a href=https://sso.agc.gov.sg/Act/ANA1966 target=_blank>Air Navigation Act 1966(AIR NAVIGATION ACT 1966 2020 REVISED EDITION Issued on 30 March 1987. Last amended on 31 December 2021. Section 62.)</a></li><li><a href=https://sso.agc.gov.sg/SL/ANA1966-RG2?DocDate=20140101 target=_blank>Air Navigation (Licensing of Air Services) Regulations(G.N. No. S 344/1974, 1 January 1975, last amended on 1 January 2014, Part IA, Sections 2F, 2G and 2H.)</a></li></ul>