The Irish church is now a separate entity from the state and its bishops are no longer allowed to act as ministers.
They can only make a speech and make a ministerial visit to church members.
The state will now decide what goes on at the church.
The move has been widely criticised and the church has been criticised for being too secretive about its finances.
The Irish government has already been forced to apologise after the Guardian newspaper revealed it had taken a €10m (£9.4m) loss on a €6m stake in the church that it bought for a further €2.6m.
The church has denied that the stake is worth more than it is.