SkyCity's deal over pokies in exchange for a national convention centre comes after three failed court attempts to expand its casino business.
It repeatedly challenged the Gambling Commission over its restrictions - so much that ministers overseeing gambling regulation have been warned about direct lobbying by the casino company.
SkyCity has not filed a court challenge since the National Government came to power in 2008.
Instead, it began negotiating with the Government in 2009 over concessions on gambling rules in exchange for building the $350 million convention centre next to the casino.
It wants an extra 350 to 500 poker machines, more table games such as blackjack or poker and an early extension to its gambling licence.