Perera is, therefore, now free to return to domestic and international cricket without restriction and with immediate effect.
The ICC has made the decision after the WADA-accredited laboratory in Qatar yesterday withdrew its original Adverse Analytical Finding following investigations.
ICC Chief Executive David Richardson said: "We wish to make it clear that there is no evidence that Mr Perera has ever used performance-enhancing substances and we wish him well in his future cricketing endeavours."
Pursuant to the ICC's WADA-compliant anti-doping code, the full laboratory documentation packages in respect of each of the findings were reviewed by three members of the ICC's Independent Review Board (comprising of world leaders in the medical, scientific and legal fields of anti-doping), each of whom independently confirmed that Mr Perera had a case to answer.
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Accordingly, on December 7, 2015, the ICC charged Perera with an anti-doping rule violation and, in accordance with the mandatory requirements of the code, provisionally suspended Perera until that charge was resolved.
In addition, the Qatar laboratory analysed the B samples provided by Perera in January 2016, and reported that that analysis confirmed the presence of the same substance in those samples.
In response, the ICC commissioned an independent expert
to review all of the Qatar laboratory's findings. Whilst the independent expert concluded that the Qatar laboratory had correctly identified 19-Norandrostenedione in the samples, that expert's view was that an adverse analytical finding by the laboratory was not sustainable, because, for various scientific and technical reasons, it could not be ruled out that the 19-Norandrostenedione was produced naturally in the player's body and/or formed in the samples after the player provided them.
It has advised that no specific further investigation of the player's two samples is warranted, but has recommended the monitoring of the player's steroid profile moving forward.
As a result, the ICC has immediately withdrawn the disciplinary proceedings previously brought against Mr Perera, and he is therefore free to train and compete domestically and internationally again without restriction with immediate effect.
Richardson said: "Cricket is proud of its compliance with the structures and systems required by WADA and takes comfort from the fact that samples are tested in accordance with WADA-approved standards and at WADA-accredited laboratories. However, the ICC is troubled in this case by the fact that the Qatar laboratory has issued an Adverse Analytical Finding that has then had to be withdrawn and replaced with an Atypical Finding.
He went on to say: "Had it not been for the diligence of Mr Perera's legal team and the ICC's own desire to uncover the explanation for the reported findings, the consequences could well have been different, and that should be of concern to all involved in the fight against doping. We regret what Mr Perera has had to endure, and would like to commend him for the manner in which he has conducted himself throughout this period.