Leaked documents show New South Wales park rangers will have to wear high-visibility clothing to ensure they do not accidentally get shot when hunting commences in National Parks.

The State Opposition has obtained the latest draft version of the risk assessment being prepared by the Office of Environment and Heritage.

It shows that hunters will be unsupervised in around 63 per cent of the total land being opened up.

Labor's environment spokesman Luke Foley says the document shows a potentially dangerous situation for National Park staff.

"That's not a responsible course of action," he said.



"The responsible course of action, when you're faced with the report from your own experts that says there's a high risk of someone being shot, would be to abandon the program.

"The danger is not eliminated by a worker wearing a high-viz vest."

Hunting was due to begin next month, but last week the Government announced it had been postponed.

The State Government says the risk assessment is still underway and it wants to get things right.