It was recently revealed during court proceedings against former Greens leader Bob Brown and other protesters that forest practices officers under legislation did not have the correct authority to issue forest practices plans to allow for logging operations.

This stirred an announcement out of the government that it would introduce retrospective legislation to validate decades' worth of logging operations.

Campaign group Blue Derby Wild on Monday announced it would test the legality of logging in Krushka's forest next to the renowned Blue Derby mountain bike trails.

Campaign co-ordinator Louise Morris said an application had been filed for an interlocutory injunction on Friday, April 8, for an immediate stop to logging and forestry activities in the active coupes.

"This case will shine the light on the failures of the Forest Practices Authority, Sustainable Timber Tasmania, and the Tasmanian government's ongoing failures in carrying out unlawful native forest logging in Krushka's, and by implication, across Tasmania," she said.

Government minister Guy Barnett last week described the issue regarding forest practices plan approvals as a highly technical administrative matter under the Forest Practices Act.

"This matter relates to the construction and form of the delegation instrument and does not go to the safety or appropriateness of forestry operations undertaken on-ground," he said.