Wicklow County Council has been charged over the deaths of two firefighters almost four years ago.
Mark O'Shaughnessy and Brian Murray were killed as they tackled a blaze at a disused warehouse on the Lower Dargle Road in Bray on September 26 2007.
No charges have been brought against any named individual, but the council faces four counts of breaches of health and safety laws after a joint investigation by the Health and Safety Authority and gardai.
If found guilty, as a corporate entity, Wicklow County Council faces maximum fines of 12 million euro - three million euro for each offence.
The families of 26-year-old Mr O'Shaughnessy and father-of-15 Mr Murray, 46, were in Bray District Court for the short hearing.
They have always maintained the men's deaths were not the result of an accident, but a consequence of council policies.
Judge Murrough Connellan adjourned the case until October 11 when the book of evidence is expected to be served.