A Special General Assembly of the Presbyterian Church in Ireland (PCI) will take place in Belfast to discuss and agree new safeguarding measures following "significant failings" acknowledged by the PCI last month.
It comes after an internal report uncovered serious issues in the church resulting in the Moderator Dr Trevor Gribben stepping down from his role.
The special General Assembly was announced by new moderator Dr Richard Murray to enable church members to gather and discuss matters following a turbulent number of weeks.
The PSNI has begun a criminal investigation into safeguarding at the PCI and the Charities Commission for Northern Ireland also announced an inquiry.
PCI general assemblies usually take place annually in June.
While holding two general assemblies in one year is rare, it is currently viewed as necessary.
Around 900 voting members, including ministers, elders and others who have voting rights, will be in attendance.
People who do not have a right to vote under existing general assembly rules can take part in the debate.
Organisers have said there is capacity for 1,200 should members of the public wish to attend.
The event will begin at 11am with an hour and a half of worship, followed by a break for lunch, after which, a report from the PCI's General Council will be discussed and resolutions voted on.
In a letter to ministers, Dr Richard Murray said that worship and prayer would enable members to "come together as a family before God to grieve and lament for our failings".
He added that they should also be "particularly mindful of those who have been harmed as a result of our central failings."
Resourcing and elevating safeguarding in the Presbyterian Church in Ireland is likely to be raised as are governance, culture and integrity at a denominational level.
Proceedings will be live streamed on the PCI's website which will require the chair to remind participants of the police investigation which is under way.
The Presbyterian Church has around 185,000 members in more than 500 congregations.
The majority of them worship in Northern Ireland, but there are significant concentrations in the border counties of the Republic of Ireland and elsewhere.