The Commerce Commission and Auckland Airport's latest interactions are being seen as a sign regulation is working. 

Auckland Airport isn't lifting its airline charges for the next two years as much as intended, after the commission's report showed their targeted returns were too high.  

The report also found the airport's multi-billion dollar infrastructure investment plan is appropriate. 

CEO Carrie Hurihanganui told Mike Hosking they said last year that if the commission continued to see a difference between the returns they targeted and what they received, they would change it, and they did.  

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