Pedro De Pakas fronts court accused of threatening MP Barnaby Joyce's AFP security officer on New England Highway during federal election campaign

Pedro De Pakas, 52, was briefly left without legal representation after his solicitor was allowed to withdraw in Tamworth Local Court on Wednesday.

"I will contact Legal Aid immediately after court and advise them of the situation," defence solicitor Yvonne Phillipos said.

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Police prosecutor Sergeant John Brissett told the court officers had not yet finalised the brief of evidence in the matter and it was adjourned to August.

Commonwealth prosecutors are flagged to take over the case.

An email from the federal prosecuting authority, the CDPP, said videos of the alleged incident on the side of the New England Highway, as well as transcripts and statements, still needed to be added to the brief.

De Pakas remains behind bars and told the court he wanted to make a bid for bail with the support of the on-duty Legal Aid lawyer.

Court documents show no application was made at the time and his release was formally refused, but a bail review was listed for next month.

De Pakas has not been required to enter a plea to the single charge of threatening serious harm to a Commonwealth judicial or law officer.

The court previously heard police allege De Pakas had seen the then Deputy Prime Minister pulled over on the side of the New England Highway near Moonbi on April 1.

He is accused of completing a u-turn, stopping and verbally threatening harm to the Australian Federal Police (AFP) officer, who was providing security to New England MP Mr Joyce during the federal election campaign.

Police claim De Pakas adopted a "fighting stance" during the stoush.

De Pakas was arrested by officers from Operation Wilmot - set up to ensure the safety of candidates - in the days afterwards.