Since the beginning of the year, DOC rangers have made multiple visits to tourist hot spots to check tour operators have a valid permit to operate.
Spot checks have been completed at Okere Falls, Waiotapu, Kakaramea/Rainbow Mountain and Tarawera Landing.
DOC Supervisor Caraline Abbott says any commercial operation on public conservation land requires a permit (called a concession). This includes commercial guiding of tourists and grazing farm animals.
"Essentially, unauthorized commercial operators are making a living at the taxpayers' expense: they're gaining reward – usually financial – through the use of public amenities and not giving back to the upkeep of the area they've been using to conduct their business," Abbott explains.
"Before authorisation is given to use public lands, we assess their activity based on environmental impact and potential disruption to the public. Once a permit is issued, there are usually ongoing fees which either go to tangata whenua or the government and can be used in the upkeep of the area."
Abbott says if cultural or environmental concerns become evident, operating conditions can be imposed on the permit holder to make sure any effects are mitigated.
"The amount of public land that is managed by DOC is immense and we can't have eyes everywhere, but we've been actively monitoring operators in popular tourist areas.
"Overall the percentage of operators complying with the conditions of their concession has been pleasingly high. Unauthorised operators have been applying for the appropriate concession, and one operator is facing legal action as a repeat offender."
Authorised DOC concessionaire David Walmsley from Totally Tarawera says the concession process provides safeguards to ensure all operators on DOC-managed land meet certain criteria and there are good principles involved in looking after the land.
"Also, the fees go toward the upkeep and improvement of the areas we use to operate our business so that has got to be good. It's a positive promotion for us to show we have a DOC concession."
A list of approved DOC operators and information on the concessions process can be found here.
DOC encourages members of the public to report suspicious or illegal activity to the 24-hour hotline 0800 DOC HOT (0800 362 468).