By Karolos Grohmann

ATHENS (Reuters) - The International Olympic Committee is expected to strip disgraced U.S. sprinter Marion Jones of her medals this week and bar her from future Games.

However, the far trickier task of reallocating her medals may not take place during the December 10-12 IOC executive board meeting.

"The reallocation itself may not be decided during this meeting," said an IOC official.

Jones, who two months ago admitted to using banned substances before the Sydney 2000 Olympics where she won five medals, including three golds, has already returned the medals and her results were recently annulled by the International Association of Athletics Federations.

She now faces a prison sentence for lying to federal agents.

IOC president Jacques Rogge has said that only clean athletes will get the medals stripped from Jones and that will not be straightforward.

Greek sprinter Katerina Thanou won silver in the 100 meters in Sydney but was at the centre of a drugs scandal in Athens four years later.

Many IOC members have publicly objected to Thanou, who was suspended for two years following the missed test on the eve of the Athens Olympics, getting the Sydney gold.

The U.S. 4x100 and 4x400 relay teams could also stand to lose their medals due to Jones but some team members have said they do not intend to give the medals back.

The IOC will also receive the latest progress report on next year's Beijing Games.

With the Games less than nine months away, the Olympic stakeholders are under pressure to take a tougher stand on China over its human rights record.

Tibetans will demonstrate outside the IOC headquarters in Lausanne on Monday, demanding admission to the organization.

"Tibetan Olympic Committee members, athletes from Team Tibet and about 120 people will demand an answer from the IOC," campaign coordinator Kelsang Gope told Reuters.

China has ruled remote Tibet with an iron hand since Communist troops invaded in 1950.

"While they are aware of the application they refuse to respond," he said.

The IOC will also discuss betting in sport, an issue that has gained considerable interest following a series of scandals, most recently in tennis where Italy's Alessio Di Mauro was banned for nine months and fined $60,000 for betting on matches.