OBS_VALUE: <ul><li><a href=https://www.legislation.gov.au/Details/F2013L00183 target=_blank>Sydney Airport Slot Management Scheme 2013(Sydney Airport Slot Management Scheme 2013 , 6 February 2013, not amended since, Section 10 and Part 2 Division 3 Section 20)</a></li><li><a href=https://www.infrastructure.gov.au/sites/default/files/migrated/aviation/airport/planning/files/Sydney_Airport_Slot_Administration_Manual.pdf target=_blank>Sydney Airport Slot Management Administration Manual(Australian Government,  Sydney Airport Slot Management Administration Manual, Version 1.1., adopted in October 2012 and last amended in July 2013, 5.3.5 Slot swaps)</a></li><li><a href=https://www.legislation.gov.au/Details/C2016C00441 target=_blank>Sydney Airport Demand Management Act 1997(Act No. 173 of 1997, Date of Assent: 17 November 1997, Last amended on 5 March 2016, Part 4—The Slot Management Scheme, Division 1, sections 34-35                              )</a></li></ul>