''The ACCC will also be seeking talks with industry participants over the coming weeks,'' it said. Written submissions are required by July 1. BHP Billiton chief executive Marius Kloppers said yesterday he was confident the proposed takeover would be successful. He said it would not present any no economic issues for steelmakers and customers. BHP Billiton, the world's largest mining company, last week kicked off the formal regulatory process for the bid when it filed its first paperwork with the European Commission, the European Union's antitrust regulator.