The export of kauri logs as Maori carvings is closely monitored and is not being used as a loophole, Primary Industries Minister Nathan Guy says.
Northland conservationists have complained large logs are being dug out of wetlands and sold overseas. The ecologically sensitive wetlands are badly damaged in the process, the Far North Protection Society says.
Swamp kauri can be exported if it is a finished or manufactured product, or a personal effect.
Whole or sawn salvaged swamp kauri stumps or roots can be exported with a milling statement and export approval. Swamp kauri logs may not be exported, either whole or sawn.
But with swamp kauri fetching large sums overseas, particularly in China, the society says logs were being passed off as Maori carvings and sent out of the country. It has complained that the Ministry for Primary Industries and Customs have turned a blind eye.