Even as the Government tightens the rules around mining and exporting swamp kauri, conservationists are calling for the Auditor General to conduct an independent inquiry into the industry.
Primary Industries Minister Nathan Guy announced new measures on Monday to prevent habitats being damaged by extraction and ensuring all stages, including milling, manufacture or products and export, are monitored and recorded in an unbroken paper trail.
Dean Baigent-Mercer, Far North conservation advocate for Forest and Bird, said swamp kauri was one of the world's most expensive timbers and found almost exclusively under Northland wetlands.
"Hundreds of millions of dollars' worth of swamp kauri has been moved out of Northland in the past few years, yet the minister said it is only worth $25 million to the region," Mr Baigent-Mercer said.
"An independent inquiry by the Auditor General into MPI and Customs is now more necessary than ever."