The review is being led by the Department of Labour and a final report, including options and recommendations was to be presented to the Government by March 31, next year.
Department of Labour group workplace policy manager Craig Armitage said the extension was to give operators sufficient time to engage more fully with the review, given the summer period would be particularly busy.
"The review team is continuing to engage with a wide range of stakeholders and the extra time will allow for more robust stocktakes of risk management and safety provisions in the adventure and outdoor commercial sectors in New Zealand and internationally," Mr Armitage said.
The final report will now be sent to Minister of Labour Kate Wilkinson for her consideration by May, 31 next year.
The public consultation period for the review closed last Wednesday.
Mr Armitage said 138 questionnaires were returned from a wide range of adventure and outdoor commercial sector operators, related organisations and individuals.
The department had started analysing the responses and would be reporting back to the minister by the end of January.
"We won't be in a position to comment on the submissions until the analysis has been completed and reported to the minister," he said.
Queenstown Lakes District Council outgoing chief executive Duncan Field had been selected by the council to represent Local Government New Zealand on the steering group and the project working group.
He told the Otago Daily Times he was not sure he would be continuing serving on the groups, given he has not been reappointed chief executive.
The council was involved in the adventure tourism industry from the perspective of resource consenting, legislation such as the Shotover River Empowering Act and the harbourmaster function and bylaws.
The review would be undertaken in two phases, with phase one covering scoping and establishing the knowledge base and stage two looking at the analysis, problem definition and reporting.
Labour Minister Kate Wilkinson said the aim of the national review was to ensure the adventure tourism sector had the best possible safety while retaining the "dynamism" which set it apart from the rest of the world.
The review was initiated by Prime Minister John Key, following the death of a tourist during a river-boarding trip on the Kawarau River last year.
