Final instructions are imminent from An Garda Síochána in the Arlene Arkinson case, a lawyer told an inquest.
The coroner’s probe is seeking documentation about the Garda investigation into the schoolgirl’s disappearance.
Arlene (15), from Castlederg in Co Tyrone, vanished after a night out across the Border in Co Donegal in August 1994.
She was last seen being driven down a country road by convicted paedophile and child killer Robert Howard.
Coroner's barrister Ronan Daly said he spoke to a senior counsel instructed by Ireland's Chief State Solicitor.
Mr Daly said: “He confirmed the position that his understanding was that final instructions were imminent from An Garda Síochána.”
A meeting is planned to be held between legal representatives north and south in Dublin next month.
Lawyers for the Arkinson family and gardaí who investigated the disappearance said there seemed to be light at the end of the tunnel and it was encouraging news.
Coroner Brian Sherrard said: “The import of inquests like this is that we have an opportunity to see exactly what is out there.”
He added they could not finish the inquest without knowing something about material in the possession of the Garda.
Hearings were adjourned earlier this year and a preliminary hearing to discuss legal issues was held at Belfast’s Laganside courthouse.
Judge Sherrard has spoken out about the level of red tape hampering cross-Border co-operation.
A legislative change by Minister for Justice Frances Fitzgerald has authorised the sharing of information.
Mr Howard was acquitted of Arlene's murder in 2005 by a jury not told of his lengthy criminal past which included the murder of South London teenager Hannah Williams several years earlier.
The schoolgirl’s remains have not been found.
PA