The pace bowler has secured 309 Test scalps in 71 appearances with an impressive average.
Australia's selection chief Bailey has confirmed that pace spearhead Cummins will play a "major part" in the forthcoming Ashes series.
There were concerns that the 32-year-old might be unavailable due to a stress fracture in his back that had not yet healed.
Previous updates from the squad suggested no official announcement had been made regarding whether he would play, with the Test matches scheduled to begin on 21 November in Western Australia.
The selector shared that his recovery is on track and was "optimistic" about his chances of taking part.
"We're aware that the window is narrowing and various factors at play, aside from his injury, but additional elements," he commented.
"We're encouraged. We firmly believe that he'll participate in a significant role. With luck starting in Perth. If not, then we'll pick it up."
Past Concerns
Cummins was ruled out the white-ball matches against both Asian and Trans-Tasman rivals in the previous weeks after scans revealed a stress reaction in his back.
He has a history of recurring issues, with setbacks in several earlier campaigns causing him to miss several home seasons in four years.
The bowler mentioned he would be ""aggressive" and "take risks" in his comeback strategy to make the squad for the contest.
He mentioned that he did not know if he had started his bowling workouts as part of his rehabilitation but admitted it was "getting tight" for him to regain fitness for the initial match.
Backup Options
Should Cummins not be fit, veteran batsman Smith will assume leadership.
Versatile player Green was excluded lately from the national team for their ODI contests against the Asian giants as a safety move because of an abdominal issue.
Bailey described it as a "small issue and mentioned that Green will play in the domestic first-class competition, so will be "ideally positioned to be ready to bowl."
"Extensive planning has gone into building out the plan for him to be available for the first Test as an all-rounder," the selector detailed.
"His involvement was limited to the initial matches regardless. How he handles the bat in limited-overs, should it hinder progress for 24 more hours, we just made the decision to take a cautious route."
Match Calendar
The Historic Rivalry
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