Veteran Afghanistan all-rounder Mohammad Nabi has been fined 15 percent of his match fee for breaching the ICC Code of Conduct during his side’s defeat to South Africa.

The incident took place at the start of the 14th over of Afghanistan’s innings, when Nabi engaged in a prolonged discussion with the on-field umpires regarding South African pacer Lungi Ngidi’s wristband. The exchange was deemed a violation of the code.

In a statement, the ICC confirmed that Nabi had breached Article 2.4 of the Code of Conduct for Players and Player Support Personnel, which pertains to “disobeying an umpire’s instruction during an international match.”

Along with the fine, Nabi was handed one demerit point. This is his first offense in a 24-month period.

“Nabi admitted the offense and accepted the sanction proposed by David Gilbert of the ICC International Panel of Match Referees, eliminating the need for a formal hearing,” the ICC said.

The charge was leveled by on-field umpires Jayaraman Madanagopal and Sharfuddoula Ibne Shahid, third umpire Nitin Menon and fourth umpire KN Ananthapadmanabhan.

The disciplinary action followed a dramatic encounter in which South Africa edged Afghanistan after two Super Overs in one of the most thrilling T20 matches in recent memory.