The High Court challenge to the board of inquiry's decision was mounted by environmental groups Fish & Game, Forest & Bird and the Environmental Defence Society.
A lawyer for the regional council and HBRIC, Trevor Robinson, told yesterday's hearing the board needed to set clear "demarcations of how long parties have to confer" ahead of its new deliberations.
Mr Robinson said HBRIC had "a very real concern" about "gaming of the consultation process designed to frustrate the RWSS".
The chairman of the board of inquiry, retired High Court judge Lester Chisholm, said the board would include a time frame as part of its directions on how it would proceed.
"We're conscious, as is everyone, that this matter shouldn't be allowed to drag on indefinitely," he said.
HBRIC has given itself until the end of March to achieve "financial close" on the project, otherwise it will need to source additional funding from the council or elsewhere to continue its work on the project.