David Warner has avoided suspension and copped a fine of AU$13,500 (NZ$14477) after being charged over his staricase stoush with Quinton de Kock.
Warner accepted a level-two charge by the International Cricket Council (ICC) for conduct "that brings the game into disrepute".
Australia's vice-captain was docked three-quarters of his match fee and slapped with three demerit points, effectively putting him on a final warning for the next two years.
Any more demerit points for Warner, even for a minor indiscretion, will automatically trigger a suspension.
The same charge has been levelled at de Kock but his punishment will be less severe as it is a level-one infraction.
The tourists are desperate to draw a line under the ugly off-field spat which involved Warner being restrained by teammates as he raged at a comment the Proteas' wicketkeeper allegedly made about his wife.
South Africa took a different view, confirming they would contest de Kock's charge.
But the decision was upheld.
De Kock fronted a hearing chaired by match referee Jeff Crowe in Port Elizabeth on Thursday, having been booked for his role in an ugly staircase scrap with Warner during the first Test.
South Africa argued de Kock was provoked, but Crowe ruled the original punishment of one demerit point and a fine should stand.