Mr Foss pointed to the commission's press release last week "reinforcing the confidential nature of any complaint''.
"The Commerce Commission, as part of their normal business, are dealing with sensitive affairs at all times and as in their press released treat matters in confidence and very sensitively''.
Mr Jones' questions followed his successful bid this afternoon to have Parliament authorise the public release of his letter of complaint to the commission. The letter was tabled in Parliament last week but Clerk of the House Mary Harris deemed the risk of defamation action against her office too great if she was to release it more widely than just to MPs.
NZ First Leader Winston Peters moved that the House order the Clerk of the House release the letter, a motion that was passed without opposition.
The motion gives Mr Jones' letter the protection of parliamentary privilege meaning the media can now report on its contents, which are in line with the the allegations Mr Jones made in the House last week.
The Commerce Commission yesterday confirmed that in addition to Mr Jones' letter, it had now received "a small number of complaints'' from suppliers alleging anti-competitive behaviour by Countdown.
Prime Minister John Key yesterday said his Government had encouraged the commission to begin a formal inquiry.
"My view is it's very healthy to have the inquiry. Let's have a look and see what comes out of it.''
A Countdown spokeswoman yesterday said it would ``participate fully with any inquiry from the Commerce Commission''.
The company would have to see the detail of the concerns raised by suppliers before commenting.
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Shane Jones' letter to the Commerce Commission: