Australia, India and Sri Lanka will participate in the 29th tri-series in February, but the 2008-09 summer season will have a new look with CA to schedule Australia to play separate, five-match head-to-head one-day series against South Africa and New Zealand.
Australia will also play three Tests and one Twenty20 game against both the Proteas and Black Caps next summer, and the same format will take place in 2009-10, when the West Indies and Pakistan tour here.
CA said it will assess the success of both seasons before deciding whether to revert to the tri-series, an annual competition since 1979-80, or abandon it for good when England next tour in 2010-11.
Critics claim the tri-series has been too long, predictable and contained too many neutral games.
But CA said its change had more to do with gaining extra flexibility over scheduling.
Scheduling is one of cricket's major problems, as eight of the 10 Test-playing nations share the same season.
This southern summer has highlighted the difficulties confronting CA, as India's current home series against Pakistan means Anil Kumble's side will not arrive here for a fortnight, leaving Australia short of international cricket in what is usually its busiest time.
"It's a better fit for us to have teams come in for a short, sharp visit," CA chief executive James Sutherland said Monday.
"Whether the Test matches or one-dayers are together or they're split, or they're in a block, that's something we can vary from series to series and from year to year."
CA has a preference for playing Test matches at the start of the international summer and one-dayers over the second half, but does not expect to announce its 2008-09 schedule until March.
South Africa have in recent times pushed to host their own Boxing Day Test, but are set to play Australia in next year's showpiece match at the Melbourne Cricket Ground.
Sutherland assured Australian fans the two traditional fixtures, the Boxing Day Test and the new year's Test at the Sydney Cricket Ground, were not in danger of being moved for the next decade.
"There is absolutely nothing on the horizon to suggest those are in doubt," he said.
"We know that because we know the program through to 2012 and we've seen drafts through to 2017 and there is nothing to indicate there will be any sort of problem."