Here is some info on omb prehearings and hearings:
https://www.omb.gov.on.ca/english/OMBInformat...vents.html


"The OMB may hold a preliminary meeting of the parties and participants before a hearing, especially if the matter in dispute is expected to be long or complicated. Pre-hearings can help make hearings more efficient by:
identifying issues, parties and participants
organizing complicated hearings
determining what documents should be exchanged, and
determining procedures before and during the hearing."


"When the hearing is expected to last more than a week, the Board may hold a pre-hearing."