OBS_VALUE: <ul><li><a href=https://sso.agc.gov.sg/SL/MPASA1996-N1 target=_blank>Maritime and Port Authority of Singapore (Licence Fees) Notification(Maritime and Port Authority of Singapore (Licence Fees) Notification, N 1G.N. No. S 189/1997REVISED EDITION 2000, (30th April 2000). Issued on 09 April 1997. Last amended on 01 August 2010. )</a></li><li><a href=https://sso.agc.gov.sg/SL/CAASA2009-S311-2009 target=_blank>Civil Aviation Authority of Singapore (Licensing of Airport Operators) Regulations 2009(Civil Aviation Authority of Singapore (Licensing of Airport Operators) Regulations 2009. Issued on 01 July 2009. Last amended on 01 September 2020. )</a></li></ul>