June 2011: SkyCity wins with $350m bid. Its convention centre requires no taxpayer funding but depends on changes to Gambling Act to allow more pokies and other concessions.
June 2012: Auditor General announces inquiry into the way the Government sought proposals for the convention centre.
February 2013: Auditor General clears Key of wrong-doing but says Govt's dealings with SkyCity "fell short of good practice in a number of respects".
May 2013: Govt signs initial deal with SkyCity for a $402 million convention centre. The deal extends the casino's licence to 2048 (beyond expiry date of 2021) and allows 230 more pokie machines and other concessions worth an estimated $527m over 35 years.
November 2013: Parliament passes legislation to allow gambling concessions.
December 2013: SkyCity decides to build a 500-bed hotel on former TVNZ land surrendered for the convention centre.
December 2014: SkyCity lodges resource consent, revealing the cost of a new convention centre has increased by between $70m-$130m. Government says taxpayer funding may be needed.
February 2015: Key warns that without the extra funding the convention centre could be "an eye-sore" but later clarifies that public funding is "the least preferred option".
February 2015: Economic Development Minister Steven Joyce today announced that SkyCity had agreed not to pursue a financial contribution from the Government and would instead amend its design to ensure the facility can be completed without financial input from the Crown.