Petro does not need an IPO to trade public. I beleive what Owen is saying is that within 6 months of going public he is hoping Petro will be producing the required min of $50 M to have an IPO which in turn would probably allow the compsny trade on a higher platform like the NASDAQ.
This website gives a good explanation of the IPO process. Also click on the many links at the bottom of the page to better understand the terms and procedures of going public.