The Attorney General has been ordered to apologise to Parliament after he breached rules on declaring financial interests.
Millionaire Geoffrey Cox - who is the top lawyer in Boris Johnson's new Cabinet - was rapped by the Parliamentary Standards Commissioner over the failures today.
The watchdog found he declared rent from a London home more than a year late.
The Commons Standards Committee said it was a "oversight" and "genuine misunderstanding" but Mr Cox must apologise in writing to the House of Commons.
It is the second time the QC, who has been rapped by the Commissioner after
Mr Cox broke rules which said any property giving a rental income over £10,000 a year must be registered within 28 says.
The MP, who was appointed Attorney General in July 2018, registered such income from his former London residence in January 2019.
He admitted at the time that he was declaring it late, as the property first became registrable in September 2018.
But it later emerged he was wrong and the property should have been registered from 1 November 2017.
He accepted responsibility for the error, which he said "arose from a misunderstanding of the interpretation of the rules," a report today said.
The Standards Committee said: "We do not consider that Mr Cox’s two errors in the present case constitute serious breaches of the rules; the first arose from an oversight and the second from what was clearly a genuine misunderstanding.
"Nonetheless, because there were two errors in succession, and because Mr Cox had committed an earlier breach of the rules on registration, the Commissioner acted rightly in referring this matter to us.
"We recommend that Mr Cox should at the earliest opportunity apologise in writing to the House through this Committee for having registered a financial interest late and for having, albeit unintentionally, supplied wrong information about the date at which the interest became registrable.
"His written apology, when received, will be published on our website."
