The Australian Competition and Consumer Commission is keeping a close watch on the country's major supermarket chains, airports and the telecommunications sector to ensure they do not abuse their market power in the delivery of their services to the paying public.

In a Melbourne Press Club function today, Rod Sims, new ACCC chairman, said there is a need to monitor major supermarket chains Coles and Woolworths as both have major market power.

"Many smaller suppliers to the supermarkets feel they lack a real ability to negotiate supply arrangements, The ACCC can and will watch closely to ensure any such dealings do not involve unconscionable conduct by the supermarkets,'' Sims said.

ACCC will closely inspect the vertical integration in the supply chain, where both Coles and Woolworths happen to sell branded and their own private label products, to ensure the two supermarket giants do not abuse their market power.

The new ACCC chief raised apprehensions on the rollout phase of the National Broadband Network, as service providers will continue to depend on Telstra's copper network.

"During the transition it is crucial that there is equivalence of outcomes, that there is a level playing field so that the competitive landscape is not distorted as the NBN is rolled out," he said.

Australia's airports also need to rework its regulations and stop the rampant monopolistic practices on car parking and services to airlines, Sims said, listing down an approach to urge true commercial negotiations between airports and their users, free of the use of market power.

"When airport users are negotiating with the airports, they can have access to an outcome arbitrated by the ACCC if required. This is part of our most recent submission to the Productivity Commission on the subject," Sims said.