Prima facie case determination directs Commission to record an opinion on anti-competitive conduct within prescribed statutory timelines. The Secretary must scrutinise an information or reference, remove defects and place it before the Commission so the Commission can form an opinion on the existence of a prima facie case; in alleged anti-competitive agreements and abuse of dominant position matters the Commission should, as far as possible, record that opinion within the prescribed statutory period and convene its first ordinary meeting within a further short prescribed period after placement.