The company that owned the Pike River mine when 29 men died in explosions two years ago will give evidence on Thursday in Greymouth District Court.
Pike River Coal faces nine charges under health and safety legislation and will give evidence in a formal proof hearing, which means there is no opposition.
Media applications to record the proceedings have been denied and it is still uncertain whether any media will be allowed to observe.
The judge is expected to clarify the extent of the restrictions before the hearing begins on Thursday morning.
The lawyer for former Pike River Coal boss Peter Whittall will also appear to discuss dates when he will defend the 12 charges against him.