Olympic chief Jacques Rogge has given USA Track and Field until February to turn over documents relating to Jerome Young's doping case.
Rogge does not rule out legal action against USATF
Young was part of the USA's victorious 4x400m relay team at the 2000 Olympics,
despite having tested positive for
nandrolone in 1999.
He was cleared on appeal by USATF in a secret process.
And Rogge said he would write to USATF to insist it provided full details of why the decision was made.
Rogge would not say what measures he might take if USATF refused.
"We will see what the USATF will do with our request," he said.
"It is not for us to start menacing or threatening people or organisations. We will see in February what we have to do in this respect."
The IOC is investigating whether Young and the rest of the US 4x400m relay team should be stripped of the gold medal.
USATF has repeatedly declined to provide the requested information, citing confidentiality rules in place at the time.
The Court of Arbitration for Sport, in a case also involving the International Association of Athletics Federations (IAAF), has ruled that USATF did not have to disclose details of review panels that exonerated athletes in doping cases prior to 2000.
And USATF spokeswoman Jill Geer said the organisation was legally bound not to turn over the documents.
"We have done everything we can legally and otherwise," she said.
"The CAS ruling is binding and prevents us from sharing that information."
USATF president Bill Roe said earlier in the week that there were no plans to turn over the documents.
"We would do so only if the athlete or his counsel were willing," said Roe.
"That is the only way we could under our rules at the time."
Roe said USATF had never received a formal request from the IOC panel investigating Young to turn over information.
He said an earlier fax sent by an IOC group to the US Olympic Committee (USOC) and forwarded to USATF had been unreadable and that USATF never received a response to its request for a retransmission.