The special General Assembly was called after Moderator Rev Trevor Gribben stood down last month after “serious and significant failings” were found in central child safeguarding functions from 2009 to 2022.
It emerged the church did not respond when people who had suffered abuse sought help and that some offenders who returned churches were “inadequately monitored”.
The PSNI has launched a criminal investigation.
On Monday the new moderator Rev Dr Richard Murray wrote to ministers announcing the special General Assembly to address the fall out would take place in the church headquarters - Church House - in Belfast on 18 December.
Now Rev David Bruce and Rev David Allen, Convener of the General Council and Acting Clerk of the General Assembly respectively, have written to all churches to unpack details of how the day will be managed.
The Presbyterian Church in Ireland (PCI) is inviting one elder and a minister from all 500 plus congregations across the island to attend.
The entire day will be held in public and will be livestreamed online. Access will be freely given to the media and members of congregations are also invited to attend, or follow the day's events online.
Members of the public are also free to watch from the public gallery.
Delegates are being asked to submit questions in advance - but can also ask them without notice.
The letter said: "Some of the issues to be discussed may be sensitive. Consequently, Members of Assembly are asked to submit questions in advance of the meeting. This will allow considered answers to be given. Where no notice is given, it is more likely that answers will be brief and may not match the expectations of those asking the questions."
However the letter also warned that details of specific cases and people should not be mentioned.
It advised: "Senior members of the PSNI Investigation Team and the Department of Health attended and addressed a meeting of the [PCI] General Council on 19 November.
"At that meeting, it was stated that while members of PCI are not prevented from speaking about safeguarding matters, nothing should be said publicly that would compromise their investigation.
"In practice, this means that no details of any specific past failings should be shared, beyond what is already in the public domain.
"Assembly members must note this, as it is important that nothing is said that would either potentially defame an individual, nor impinge upon the police investigation which is ongoing."
The business session of the Assembly will consist of discussing the report of the PCI General Council on the safeguarding failures.
This will be emailed to delegates and also published publicly online by PCI on 11 or 12 December.
To facilitate debate, the General Council report may be divided into sections, the letter said.
Speeches will be limited as usual to seven minutes for the proposer and seconder, and four minutes for other speeches.
Proceedings will begin at 11.00am, with a morning session of worship until about 12.30pm. The business session will follow, starting at 1.30pm until the close of business.
Recordings of the entire assembly will be available on the PCI website afterwards.
Former PSNI Superintendent, now UUP MLA, Jon Burrows told the News Letter affirmed that care must be taken not to conflict with the police investigation.
“It is understandable that the PCI will have events such as this in order to address the concerns that exist amongst their members,” he told the News Letter.
"In fact it can be important that they send a clear message that anyone who has experienced abuse feels supported to report that to the police.
"There is of course a live police investigation and therefore given the event is livestreamed they should ensure the event is managed in such a way that discussion does not stray into the investigation and everyone is clear this is not the forum to discuss specific incidents or individuals.
"A clear message to that affect should be made at the very outset for the absence of doubt.”
Meanwhile, this week also saw a Presbyterian child safeguarding expert state that believes the crisis in his own church could be similar to that seen in the Catholic Church. Internationally renowned safeguarding expert Ian Elliott was speaking to BBC ‘Spotlight’.
He had worked extensively in the Catholic Church “and I would feel strongly that there is nothing to say that we're not dealing with something similar here," he said.
Jackie Montgomery Devlin was head of safeguarding in PCI for five years from 2023. When she arrived in office she was disturbed to find almost no records. The BBC put it to her that she should have reported the situation to police.
She replied: “Well, I think I need to explain that from the start, there were no records, so I didn't know if anything had happened. If I had gone to the police at that time ... I'm sure their response might have been, 'What can we do about this when there's nothing there?'.”