The rules of that code are to choose the right trip for you, understand the weather, pack warm clothes and extra food, share your plans, take ways to get help and take care of yourself and each other.
"We want people to remember their day out for all the right reasons, not because they had a miserable time and had to be rescued," Shepherd said.
DoC senior ranger Theo Chapman said there was a wealth of advice available online.
"We encourage people to visit the DoC website and carefully select the right destination for their fitness and experience level."
More information about the Tongariro Crossing can be found on DoC's website in the Central North Island region on the 'Places to go' page, which is accessible from the 'Parks and Recreation' menu.
The New Zealand Mountain Safety Council's Plan My Walk app can be used to find the right track for a person's ability, and enables people to check for track alerts and weather warnings issued by DoC.
It also provides a suggested gear list.
Ngāti Hikairo ki Tongariro spokesperson Te Ngaehe Wanikau asked hikers to respect the maunga, themselves and their personal safety.
"When we enter this domain, we should do so with the primary focus being our safety and preparedness.
"The cost of each rescue is not just financial, the cost is also the pain inflicted on your loved ones, the anguish of companions, the potential danger and trauma experienced by the rescue teams, and the mamae (pain) of tangata whenua."