De Kock was found to have breached Article 2.1.2 of the ICC Code of Conduct for Players and Player Support Personnel, which relates to "conduct that brings the game into disrepute", following an altercation with Australia vice-captain David Warner on Sunday, which was caught on CCTV.
Meanwhile, de Kock has reportedly contested his level 1 charge against him and will attend a hearing in Port Elizabeth on Wednesday evening.
If a player accrues four demerit points within 24 months, he receives a one-Test or two-limited-over game ban.
Crowe ruled the original punishment of one demerit point and a fine should stand.
Former Australia test opener Ed Cowan announced his immediate retirement from global cricket Wednesday, leaving the game with more than 10,000 first-class runs and 25 centuries from 143 matches over 14 years.
Gibson also questioned what was meant in Australian assertions about not "crossing the line" with their behaviour.
Warner had to be restrained by his teammates after De Kock allegedly made unsavory comments about his wife Candice Warner.
Former Trump Aide Refuses Mueller Subpoena
Nunberg , a relatively peripheral Trump campaign figure, announced he had received a subpoena from Mueller's grand jury. Nunberg launched a tedious media campaign involving numerous TV interviews and phone calls to local media networks.
"It was just something that I don't believe should have been said".
New footage shows the pair walking from the ground together and Warner is heard to call De Kock a "f****** sook", according to The Australian newspaper, referring to someone who is soft or easily upset.
Warner is not the only Australian player to be punished by the ICC following what was a stormy 118run victory in Durban.
"It is quite disappointing that they would come out and make that statement", he pointed out.
The match officials and the ICC govern the game and the umpires on the field must take charge of the game. He also scored 136 when Australia beat South Africa at the Gabba in 2012, his only Test century. They are there to do a job and they must do their job.
In a video posted on Cricket Australia's website, Lehmann said he continued to back Warner as the team's vice-captain as the Australians hunt a 2-0 series lead.
Spinner Nathan Lyon was fined 15 percent of his match fee for breaching the ICC's code of conduct as he intentionally dropped the ball onto a sprawled AB de Villiers after the South African batsman had been run-out in his country's second innings.