Christchurch, Wellington and Auckland airports are subject to disclosure rules under the Commerce Act and the regulator then reviews their pricing decisions.
Commerce Commission says it is continuing to investigate suspected market manipulation in forex markets.
Tim Hunter talks about the Forex probe on NBR Radio and on demand on MyNBR Radio.
InternetNZ chief executive Jordan Carter says there are some important questions being raised by Spark.
"There were differences in the misleading representations for a start because ANZ's case was both about the ability to move the margin and about what break fees would be if you wanted to get out early," Mary Borrowdale said.