A review of the Official Information Act has received only 20 submissions and the Law Commission is relaxing its deadline.
The act was passed in 1982 and the commission says the legislation needs to be looked at again.
It says one of the reasons for the review is to catch up with changes in technology - for instance, the internet means agencies may be encouraged to put more information online.
The commission says the review will also consider whether New Zealand needs an Information Commissioner, to encourage open government and act as a watchdog.
Submissions were due to close at 5pm on Friday but the commission says it will still accept them after that time.