The IAAF says Russia's athletics federation still needed to meet two criteria related to full access to doping data stored in Moscow and financial compensation, before the ban is lifted.
The IAAF on Tuesday upheld a ban against Russia's athletics federation over doping in the country, pending full access to doping data stored in Moscow and financial compensation.
Russia's athletics federation (RUSAF) has been suspended since 2015 over a report commissioned by the World Anti-Doping Agency (WADA) that found evidence of widespread, state-sponsored doping in the sport.
The IAAF, the sport's governing body, said RUSAF still needed to meet two criteria -- access to samples of Russian athletes in a Moscow lab and full financial compensation for investigation and legal costs -- before the ban is lifted.
Russia's reinstatement has been rejected on numerous occasions by the IAAF over the past three years and should it fail to meet conditions in the coming months, it could risk missing out again on sen ding a team to next September's world athletics championships in Doha, Qatar.
TRT World's Dan Ashby reports.
The European indoor championships are even earlier, in Glasgow in March, and take place before the next IAAF Council meeting has a chance to meet to discuss further developments later that month.
Since 2015, some individual Russian athletes have been allowed to compete internationally as neutrals provided they met certain criteria that showed they had operated in a dope-free environment.
"If the Russians can and will release the (drugs) samples is up to them. I hope they will deliver the data by the end of this year," said Rune Andersen, head of the IAAF's task force on Russia, sitting next to IAAF President Sebastian Coe.
"We have received no assurances that it will be delivered to us directly. The assurances have been given to WADA and WADA has set a deadline of December 31. We will have to rely on receiving the data from WADA."
The IAAF said the athletics integrity unit must confirm it has been given the data.
"All of the data and access to the samples that it needs to determine which of the Russian athletes...have a case to answer for breach of the IAAF anti-doping rules," the IAAF said in a statement.
"The task force stands ready to meet as soon as these conditions have been met in order to make a recommendation to Council for the reinstatement of RUSAF."
But the IAAF said it had eased its demand on Russia accepting the WADA-commissioned report by Richard McLaren.
"It is not an easy one, as we would have wanted Russia to clearly acknowledge the McLaren report," Andersen said.
"But it is difficult not to do that when WADA has done it and we will have to move on and deal with what we think is most important, to get access to the data and the samples. That is what counts when it comes to the athletes."
The costs of running the task force and dealing with legal appeals by Russia about the suspension are expected to amount to several million dollars.
"It was an expected decision," Dmitry Shlyakhtin, president of Russia's athletics federation, told Reuters. "Two criteria haven't been met, as of today. Objectively, we did not expect concessions from the task force."
Russia's 2015 110 metre hurdles world champion, Sergey Shubenkov, said that, while he saw some progress, reinstatement did not look imminent.
"We are in the fourth year now. In my opinion, the situation is starting to come out of a dead end, it is developing," he said. "There is a positive dynamic here.
"I am tired of the white (neutral athlete) flag. I don't want to leave the track after my run or hide. I want, like in the old days, to hang at the stadium, congratulate the guys and run around together with the flag. I miss that."
Russia, whose athletics team was banned from the 2016 Rio de Janeiro Olympics, has accepted there was extensive doping in the country, but its authorities have continued to deny any of it was state sponsored and access to the Moscow lab data has not happened.
The International Olympic Committee (IOC) and WADA have both reinstated Russia.
WADA's controversial reinstatement in September this year was on the condition that Russia recognise the findings of its report and allow access to RUSADA's stored samples.
Failure to provide access to the full data from the Moscow lab by December 31 could lead to another suspension, WADA has warned.