The trio of officials were suspended on June 10 pending an investigation into potential breaches of the governing body’s Code of Ethics.

Their 180-day provisional suspensions had been due to come to an end today but Michael Beloff, chairman of the IAAF Ethics Board, has opted to prolong them until the end of January.

The decision was made to "allow for the conclusion of the disciplinary investigative process, including any hearing ensuing from the investigations", a statement from the Ethics Board said.

"Each of the three individuals continue to enjoy the presumption of innocence and the extension of the orders for provisional suspension should not be interpreted as any departure from the principle that each individual is to be considered innocent until the conclusion of the disciplinary investigative process," the statement added.

The provisional suspensions were imposed 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, 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 Dick 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 the Le Monde newspaper 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, who temporarily stood down as secretary general of the IAAF in December, having reportedly suggested hiring CSM, the sports marketing firm chaired by current IAAF President Sebastian Coe, to run a public relations campaign to deal with negative stories, has been accused of receiving a cash payment of either $30,000 or €30,000 from Papa Massata Diack in 2013.

Boulter-Davies, a project manager in the IAAF's anti-doping department, is accused of misleading an Ethics Board investigator following claims she had knowledge of the payment.

She joined the IAAF in September 1992 and is the daughter of John Boulter, a former British Olympic 800 metres runner and a senior Adidas executive.

Garnier is implicated as a result of a cash payment of either $10,000 or €10,000 from Papa Massata Diack, a marketing consultant to the IAAF, he allegedly received.

He is accused of having "retained some part of the sum even when aware of its apparent impropriety".