Song Young Hee is one of six judges who has been sanctioned by the governing body following this year's Aerobic Gymnastics World Championships, which South Korea hosted in Incheon in June.

She was found to not have deducted a 0.5 point penalty from the South Korean group score for a prohibited lift, despite being required to do so as the chair of the judges' panel.

This affected the final rankings and allowed South Korea to take gold over their Chinese rivals.

"Irrespective of whether the failure was deliberate or inadvertent, it was a very serious mistake," a FIG statement said.

There is no suggestion that South Korea will lose their gold medals.

As well as the two-year ban, Song must repay the CHF2,000 (£1,500/$2,000/€1,800) in per diems she received during the World Championships.

She is also liable for the costs of FIG's disciplinary proceedings.

Noemi Irurtia is another judge to be sanctioned, with the Spaniard hit with a six-month ban for biased scores in favour of her country.

This happened during the trios and aerobic dance qualification and final and the group qualification.

A three month ban has been handed to Ilona Karpenko of Ukraine for biased scores in the mixed pair, trio and aerobic dance qualifiers.

Three other judges have been warned for "unsatisfactory scores".

Milena Tarnitchkova of Bulgaria has been sanctioned for her performance in the aerobic step qualification and final, with Sweden's Ullakarin Othzen reprimanded for her display in the individual men's final.

Indonesian Jasperine Ramona Nanletta was found to have given unsatisfactory scores in the group final.

"Following this event, like after every World Championships, the FIG conducted an in-depth analysis of the scores given by sworn judges in order to ensure that athletes' results were compatible with the current code of points," a FIG statement said.

"While this analysis confirms the excellent work achieved by the vast majority of judges, a few results led the FIG to open disciplinary proceedings."

Hearings involving all of the judges were held in Olympic capital Lausanne before the FIG Disciplinary Commission, composed of Michelle Duncan, Paul Engelmann and Bernhard Welten, reached verdicts.

All six may appeal within 21 days. 

Poor judging is becoming a major problem for FIG, which has sanctioned numerous officials in the past year.

This includes three who gave biased or unsatisfactory scores during the Rio 2016 Olympic test event in April.

Plans to introduce technology to assist judges are ongoing, with Japan's newly elected FIG President Morinari Watanabe suggesting that it could be used by 2018.

The sport's biggest controversy featured American Paul Hamm in the Athens 2004 Olympic all-around competition.

The US gymnast won gold but only after South Korean bronze-medalist Yang Tae-young was incorrectly given a start value of 9.9 instead of 10.0 by judges in the parallel bars portion of the final.

The 0.1-point discrepancy was enough to drop Yang from top spot into third.

FIG suspended three judges for the error, but ruled the final results would remain unchanged.

Yang later filed an official appeal seeking to have his score changed and be awarded a gold medal.

However, the Court of Arbitration for Sport rejected this action.