denigrating comments about Māori people
The Broadcasting Standards Authority (BSA) said the on-air exchange between Banks and a caller breached the good taste and decency, and denigration standards.
In January, fill-in host Banks came under fire after he agreed with a talkback caller's racist comments.
The caller, named Richard, claimed Māori were "stone age people from a stone age culture".
"This notion that Māori are victims... they're victims of their own genetic background. They're genetically predisposed to crime, alcohol and underperformance," Richard said
"Educationally, they just do not have the - they're stone age people from a stone age culture and I'm not interested one bit, and neither have my children been interested in their stone age culture."