New Zealand's genetic modification laws could be threatened as part of the Trans Pacific Partnership agreement, the Sustainability Council warns, and it wants assurances they wont be weakened.
The broad outlines of the agreement are due to be unveiled by President Barack Obama at the Apec summit this weekend in Honolulu.
Much of the focus publicly has been on whether the operation of the Government's bulk-drug buying agency Pharmac.
Besides saying the existence of Pharmac is not at stake, the Government is keeping its negotiating position confidential with Trade Minister Tim Groser admitting this week that the "tough stuff" had yet to be negotiated.
The Sustainability Council executive direction, Simon Terry, said there was no doubt the United States would line up with the US biotech industry which wanted to weaken GM laws as part of the TPP negotiations particularly weaken the law requiring labelling of GM foods.