The commissioners, who replace 14 elected councillors sacked in March by the Government, are chaired by Dame Margaret Bazley, with David Caygill as deputy chairman and five other members - David Bedford, Donald Couch, Tom Lambie, Prof Peter Skelton and Rex Williams.
Tomorrow's meeting will bring them together for the first time in public, at 10am in the council chamber in Christchurch with a powhiri.
Three items for the commissioners' decisions are listed on the public agenda and a fourth in public-excluded sessions.
The public items include the next step in implementing the Canterbury water management strategy prepared by 10 district and city council mayors in Canterbury, including the Waitaki district, in conjunction with ECan.
The strategy was incorporated by the Government in an Act of Parliament which sacked the regional councillors, replaced them with the commissioners and gave directions on management of ECan.
Commissioners tomorrow will be asked to endorse setting up zone committees throughout Canterbury (including two covering the Waitaki catchment) as part of the strategy, adopting terms of reference for a regional committee, appointing a commissioner to each zone committee and other recommendations.
The two other items in public deal with appointments to committees - replacing the previous councillors on committees covering areas as diverse as public transport, Christchurch urban development and civil defence - and how to consider and make decisions on resource consent applications, handled in the past through the regulation hearing committee.
They will appoint chairmen and members to portfolios (committees), the second tier of the council structure, to replace councillors.
The public excluded item deals with appeals to the Environment Court on a proposed change to ECan's regional policy statement.