Russia has escaped punishment for failing to meet a 31 December deadline for providing access to the Moscow laboratory at the heart of its state-run doping programme, the World Anti-Doping Agency has confirmed.

WADA controversially lifted the Russian Anti-Doping Agency's near three-year ban in September but on two strict conditions: the Russians would let independent experts retrieve testing data from the laboratory by the end of the year, and they would then release any stored samples needed to pursue anti-doping cases by June 30.

That agreement was widely criticised by athletes' groups and national anti-doping agencies at the time and their worst fears appeared to be coming true when the Russians told WADA's first mission to the laboratory in December that it could not use the devices the experts had brought to retrieve and store the data.

This failure prompted calls for WADA to immediately rip up the September reinstatement deal and declare RUSADA non-compliant again.

WADA, however, reached a compromise with the Russian authorities over the experts' devices and sent a second, smaller team to Moscow a fortnight ago, and they successfully completed their task last week - and that is what has saved Russia from fresh sanctions.

The decision to uphold the reinstatement agreement made in September was made in two steps.

First, WADA's Compliance Review Committee met in Montreal last week to make a recommendation on RUSADA's status, and then WADA's executive committee held a teleconference on Tuesday to discuss that recommendation. Once they had, they voted by 11 to zero, with one abstention, to turn a blind eye to the missed deadline.

In a statement, WADA president Craig Reedie said: "The ExCo was pleased to hear of the significant progress that has been made in resolving the Russian doping matter since its decision in September last year to reinstate RUSADA under strict conditions.

"Collecting the all-important data is a critical step, and it was not easy to achieve. We are not yet at the finishing line and there is a lot more to do but undeniably we are much further along the track than we would have been without the September ExCo decision."

The former chairman of the British Olympic Association explained that the Moscow data must now be authenticated so it can be used as evidence in hundreds of potential anti-doping cases against Russian cheats.

But Reedie admitted that "several members of the ExCo voiced their disappointment" over the missed deadline, including vice-president Linda Helleland, who simply noted for the record that she had not changed her September position that RUSADA should not have been reinstated.

It was left to CRC chairman Jonathan Taylor to explain why RUSADA was not suspended again for what had been described as a firm deadline by Reedie.

The London-based sports lawyer said WADA Code signatories have always been given three months to take "corrective action" and it was decided that RUSADA should be treated like everyone else.

Taylor noted, though, that if it becomes clear Russia has tampered with the data "the CRC would consider that to be extremely serious non-compliance and can be expected to recommend that WADA pursues the most stringent sanctions" against Russia, which would include a ban on staging international events.

He added the CRC would receive "progress reports" on the data-authentication work every two weeks from WADA's Intelligence and Investigations department.

Speaking to reporters on a conference call after the ExCo meeting, Reedie declined to say he felt vindicated by recent events after the fierce, personal criticism he faced following the September reinstatement decision, but acknowledged that this has been a difficult process and there was still much to do.

WADA's director general Olivier Niggli also rejected the idea that WADA has given Russia more time to comply with its rules than other bodies and nations, saying the missed December deadline was actually "fast-tracked" and Russia was now subject to a much tougher timetable than previous wrongdoers.