The Parachute Industry Association says aviation-related activities should have been included in the review of adventure tourism in 2009.
The Transport Accident Investigation Commission report on the skydiving plane crash at Fox Glacier in 2010, released on Wednesday, prompted fresh calls for faster implementation of changes.
The report blamed the pilot, the company that operated the plane, the firm that modified the aircraft and industry regulator the Civil Aviation Authority.
Chris Coker, whose 24-year-old son Bradley died in the crash, has written to Prime Minister John Key urging him to tighten regulations.
A review of the adventure tourism sector was initiated in 2009, prompted by British father Chris Jordan who wrote to Mr Key after his daughter Emily drowned while riverboarding on the Kawerau River a year earlier.
Parachute Industry Association chief executive Keith Gallaher said the review covered only land-based activities, and he believes aviation should have been part of it.
"Even the amendment to the Health and Safety Act excludes the aviation activities. We didn't agree with that."
The Department of Labour is about a third of the way through implementing new rules for tourist operators.
Under new regulations, operators will be audited at least every three years, replacing the previous system of voluntary audits.
Audits of about 400 adventure tourism operators began this month but will take three years to complete.
Regulation taking too long - families
British father Chris Jordan says it is ridiculous that the adventure tourism sector is still not properly regulated.
Mr Jordan told Radio New Zealand's Morning Report programme the changes are taking too long.
"It's another three years yet before it's actually fully implemented and that's only if all the companies that should have registered have voluntarily registered.
"People still don't know who (is) actually out there running adventure tourism."
Bosco Peters' daughter Catherine died in 2009 when she fell more than 20 metres while taking part in a bridge swinging event near Palmerston North.
Mr Peters said little progress has been made to implement the new regulations and it is tragic that another father has had to write a similar request to the Prime Minister to do something about the industry.
Mr Key, who is also the Tourism Minister, said on Wednesday about 50 people had lost their lives as a result of adventure tourism in the last eight years and that was one of the reasons he had driven a tightening up of the industry.
Outdoors New Zealand chief executive Garth Dawson said the adventure tourism sector does have tight regulations, which it is putting into effect.
Third of tourism operators yet to receive certification
The Civil Aviation Authority says one in three aviation adventure tourism operators which now need certification to operate have yet to receive it.
New regulations came into effect on 1 May and require hot air balloon, hang glider, paraglider, tandem parachute and parachute drop aircraft operators to have certification.
The authority says 14 operators have been approved in the past 10 days but 7 applications have yet to be finalised.
It says 4 of those 7 operators would not be operating now anyway for seasonal reasons.
Parachute Industry Association's chief executive Keith Gallaher says it was an enormous job to finalise applications within the six month timeframe.
He says those operators that did not get certified in time are taking the process seriously and staying grounded until they are approved.
