At the national level, individuals or firms may take complaints to the National Commission. A complainant would generally be required to make the complaint in writing, providing full identification details, and a brief description of the practice that is deemed to be anti-competitive. If there are any documents to support the complaint, these should also be submitted. The National Competition Authority would also require the complainnant to provide information on all individuals or companies or organisations which are directly affected by the anti-competitive practice, and as much detail as it can provide on the relevant product or geographic market.

An enterprise that is aggrieved by the findings of the National Competition Authority can appeal to a Judge in Chambers. The Judge may confirm, modify or reverse the Commission's findings or any part thereof, or direct the Commission to reconsider its decision, generally or in part.