BBC president Richard Sharp has resigned implicit a study into whether helium failed to decently disclose his engagement successful the facilitation of a indebtedness to Boris Johnson.
He said the probe recovered helium had breached the governance codification for nationalist appointments.
Mr Sharp said the breach was "inadvertent and not material", and that the study supports his view.
The afloat KC-led study is being published today.
Barrister Adam Heppinstall was appointed by the Commissioner of Public Appointments to analyse claims which appeared successful the Sunday Times.
Confirming his resignation, Mr Sharp said the study recovered "that portion I did breach the governance codification for nationalist appointments, helium states that a breach does not needfully invalidate an appointment".
Mr Sharp said the study finds helium did not play "any portion whatsoever successful the facilitation, arrangement, oregon financing of a indebtedness for the erstwhile Prime Minister".
But helium said with hindsight helium should person disclosed his relation successful mounting up a gathering betwixt Cabinet Secretary Simon Case and Sam Blyth - a businessman who was offering the past PM fiscal assistance - to the appointments sheet during the scrutiny process up of him taking up the elder role.
He said not doing truthful was an "oversight" and apologised for it.
In a statement, Mr Sharp said helium did not privation to beryllium a "distraction", adding that it had been an honour to seat the BBC.
He volition stay successful station until June until a successor is appointed.