Northern Territory Labor MLA Manuel Brown has been removed as Opposition whip after weeks of controversy surrounding his driving record and admissions about his teenage son driving his car.

The decision follows revelations last month that the Arafura MLA's driver's licence had been suspended in October last year after he accrued 12 demerit points while driving his taxpayer-funded vehicle. Since regaining his licence, Mr Brown has also been caught speeding again.

Last week, Mr Brown — one of four Indigenous Labor MLAs in NT Parliament — admitted his 14-year-old son had driven his personal car after previously failing to disclose the fact.

His licence suspension comes years after he was convicted of driving without due care over a 2009 crash in Katherine that resulted in the death of a 62-year-old woman.

On Tuesday morning, Labor leader Selena Uibo said the "number of serious issues raised" about Mr Brown had prompted her to remove him as opposition whip, "effective immediately".

"The role of Opposition Whip is an important position within the Parliamentary Labor team. Given the matters that have been raised, I do not believe it is appropriate for Mr Brown to continue in that role," Ms Uibo said in a statement.

"Mr Brown remains a committed member of the Labor Caucus, and I want to ensure my team remains focused on holding the CLP Government to account and advocating for Territorians."

Ms Uibo said a replacement whip would be appointed before the next parliamentary sitting.

Mr Brown, who retains nine shadow portfolios, was first elected at the 2023 Arafura by-election before holding the seat at Labor's heavy defeat at the 2024 Territory election.

His licence suspension, first reported by the NT Independent, was not publicly disclosed at the time by Ms Uibo, something she accepted "should have been acknowledged publicly". After the publication alleged Mr Brown's underage son had driven his car, the MLA stated: "At no stage has my child ever driven my taxpayer-funded vehicle".

However, he told the ABC last week that his son had driven his personal vehicle in a remote part of Arnhem Land.

"Yes, he drove my [car]," he said.

"I don't want to talk much about that one, but that's what happened."

Mr Brown also told the ABC he had not disclosed his latest speeding offence and accepted he had placed Ms Uibo and the Labor caucus in a difficult position.

"I just think [I should have] come forward and [told] the public quicker than I did, and be honest and up front," he said last week.

"I'm sorry to the [Northern Territory] people and for my constituents that voted me in and have trust in me."

The latest development adds to a difficult period for the Territory opposition, which has also been dealing with an internal leadership reshuffle and allegations of bullying within Ms Uibo's office.

The complaints are understood to centre on cultural safety concerns raised by Indigenous staff, including allegations involving a senior member of Ms Uibo's office and the opposition leader's handling of the reports.

Ms Uibo — Australia's first female Indigenous leader of a political party — has defended the culture of her office and said complaints were taken seriously.

The allegations emerged shortly after Ms Uibo declared the deputy leadership vacant, with Daly MLA Dheran Young replaced by newly elected member Ed Smelt.

Following his removal as deputy leader, Mr Young said he was disappointed by the decision and would relinquish all 10 of his shadow portfolios, including Aboriginal affairs.

"It is a decision I wish has not occurred," he wrote on social media.

"I have always been clear about the direction I believe our party needs to take, the values we must stand for, and the reforms needed to make Labor stronger."

Mr Smelt won the deputy leadership ballot by three votes to two after Mr Brown, who is aligned with Labor's Left faction alongside Mr Young and Chansey Paech, voted with the unaligned Ms Uibo and Mr Smelt.

Mr Brown told the ABC he had been in contact with Mr Young but believed Mr Smelt's presence in Darwin made him a better option for deputy leader.

"Ed being in the northern suburbs, we need to win back northern suburbs, and that's just what I voted for," he said.