Tarver, who claimed the title by stopping Green in Sydney in July 2011, was stripped by the IBO after testing positive for the anabolic steroid drostanalone, a substance used by bodybuilders and athletes as a weight-cutting agent.
Having been held by the likes of James Toney, Thomas Hearns and Tomasz Adamek - and fought for and lost by David Haye - the IBO title is a belt of some standing.
Stopped in successive fights by Tarver and Krzysztof Wlodarczyk, Green rebounded with a fifth round knock of Danny Santiagio in his last bout in July. At 39 the West Australian is clearly past his best, although he will be supremely motivated as he bids to become the first Australian four-time world champion.
"I'm fighting a three-time world champion so that is not to be sneezed at," Cameron said. "Danny Green has beaten the likes of Roy Jones Jr - so he has beaten the best. It certainly won't be a walk in the park for me. But as much as I respect the man and what he has achieved, I am very confident of taking care of Danny Green."
Having returned to heavyweight to dispatch Barrett, Cameron will now need to drop around seven kilograms to make the 90kg cruiserweight limit. While that will affect his power, he expects to have a significant strength advantage over Green, who claimed world titles at super middleweight and light heavyweight before stepping up to cruiserweight.
Once he returns to New Zealand he will head straight into a seven-week pre-fight camp.
"Now that is has come off it is the brutal reality of it," he said. "It is any boxer's dream, it's always been my dream to fight for the championship of the world. Mate, I'm looking forward to it. I want to bring that title back to New Zealand."