His wife Jane Boulter-Davies and medical manager Pierre-Yves Garnier have also been handed sanctions by the IAAF Ethics Board but will be allowed to return to work from tomorrow. 

They were also cleared of corruption.

Davies admitted to two charges, leading to the official having being expelled from his role at the IAAF.

The Briton is free to assume another role within the sport, however, having been cleared of any alleged corruption.

The charges against him were upheld by the Ethics Board after it was ruled he had not fully cooperated with the investigation until late in the process.

"The IAAF Ethics Board has properly cleared me of any allegation of corruption," Davies said.

"I deeply regret misleading the Board and am very sorry that my role at the IAAF, which has been a massive part of my life for 24 years, has come to an end."

The cases emerged due to a suspected ethics breach in relation to an email reported to have been sent by Papa Massata Diack to his father, the disgraced former IAAF President Lamine Diack, who remains the subject of a criminal investigation in France.

The email, dated July 29 in 2013, purportedly claims that Valentin Balakhnichev - the former IAAF treasurer and All-Russia Athletic Federation (ARAF) President, who has since been banned for life by the Ethics Commission - had asked Papa Massata Diack to carry out "lobbying activities".

Balakhnichev and Papa Massata Diack were among three who were banned for life in January following allegations of covering up doping in Russia.

The IAAF Ethics Commission have deciphered from a report in French newspaper Le Monde that Balakhnichev had asked Papa Massata Diack to "get involved and give money to various people to keep them quiet and so that they would not object".

The Le Monde report in December allegedly outlined plans to delay the naming of Russian athletes who had failed drugs tests in the run-up the 2013 World Championships in Moscow.

Davies was alleged to have accepted a cash payment of €30,000 (£25,000/$32,000) from Papa Massata Diack in 2013 in order to run a public relations campaign to deal with negative stories.

During an investigation conducted by Sir Anthony Hooper, a former member of the Court of Appeal of England and Wales, Davies denied receiving any money from Lamine or Papa Massata Diack.

The IAAF Ethics Board said it was an "extremely serious matter" that Davies had initially misled the investigation and only admitted his lie when requests were made for his bank statements.

He claimed he had believed the funds had been released by Lamine Diack to improve the media mood just prior and during the World Championships in Moscow.

Davies claimed he had trusted the leadership of the world governing body and was attempting to help in a time of crisis.

He admitted breaching the IAAF Code of Ethics due to not attempting to repay the funds following an initial query to Papa Massata Diack about returning the money. 

They deemed, however, he had not acted corruptly, while Davies has also expressed his intention to repay the funds.

"Mr Davies has expressed deep remorse for his actions and has submitted that his actions were out of character," the Ethics Board said in their conclusion.

"It is no part of our decision that Mr Davies acted in any way corruptly.

"Subsequent to the time of the IAAF World Championships in Moscow, extremely serious corruption at the heart of the sport has come to light.

"Those revelations have come as a shock to the majority of the IAAF’s staff as well as to the wider public and it is important that we do not judge actions at the time through the lens of hindsight."

Boulter-Davies, a project manager in the IAAF's anti-doping department, admitted misleading an IAAF Ethics Board investigation.

Having quickly admitted the charge and then fully cooperated with the investigation, she was given a backdated suspension of six months.

With the sanction having commenced at the time of her provisional suspension on June 10 in 2016, the period has now expired and Boulter-Davies is free to resume her work at the governing body.

Garnier was charged with two breaches of the Ethics Code, with the Frenchman denying the claims.

Garnier has been given a backdated three-month ban, which has now expired after the period of suspension ended on September 11.

The IAAF have confirmed Boulter-Davies and Garnier will return to the organisation on a six-month probation following the completion of the investigation.

"We thank the Ethics Board, in particular Sir Anthony Hooper, for the detailed investigation and would like to acknowledge the Ethics Board’s findings that none of the individuals had any case to answer with regards to corruption and all three were commended on their efforts to ensure cheats in the sport were properly identified and bought to justice," said IAAF chief executive Olivier Gers.

Boutler-Davies was accused of misleading an Ethics Board investigator following claims she had knowledge of the payment.

She admitted the charge, stating she made the mistake out of loyalty to her husband and for fear he would be erroneously tarred with association with the serious corruption which had been uncovered among senior members of the IAAF.

In Garnier’s case, he admitted he had received €10,000 (£8,500/$10,700) from Lamine Diack via Cheikh Thiaré, the President's chief of staff, to defray expenses which would be incurred in organising a commemorative event, at Lamine Diack’s request, in the Jura region of France.

The investigation discovered the funds were in connection with the organisation of a genuine event and was not in a significantly large sum, but found Garnier had not cooperated with the investigation until a late stage and had kept the funds.

The IAAF Ethics Board decision can be read in full here.