The intellectual property chapter of the proposed Trans-Pacific Partnership (TPP), which was posted on Wikileaks, included the positions of all 12 countries and revealed a wide disagreement between U.S. demands and a bloc of other countries, including New Zealand.

The revelations prompted widespread calls for the New Zealand government to resist the demands, which many fear could destroy the country's burgeoning IT sector, undermine the ability of the government's Pharmac agency to buy affordable generic medicines, and impose restrictive copyright rules.

New Zealand's main opposition Labor Party criticized the government for keeping details of the negotiations secret from the public.

"New Zealand negotiators should remain staunch in their opposition to demands in the intellectual property area which appear to favor vested interest groups in one country to the disadvantage of others," Labor trade spokesperson Phil Goff said in a statement.

The opposition Green Party described the TPP as "nothing more than a Bill of Rights for corporate interests."

"Those behind these negotiations know full well that the public wouldn't support the TPP if they were given all the facts," Green Party co-leader Russel Norman said in a statement.

University of Auckland law Professor Jane Kelsey, who has led calls for greater transparency of the negotiations, said the TPP had been hit with a double whammy ahead of a crunch meeting in Salt Lake City next week with the Wikileaks publication and a letter by U.S. lawmakers saying they would deny President Barack Obama "fast track" trade promotion authority, stymieing his aim to get the deal signed this year.

"The obsessive secrecy surrounding these negotiations makes leaks inevitable. It is in the national interest, and the interests of democracy, for the parties to release the draft texts of all the chapters now to allow informed analysis, democratic input and assessment of the risks," Kelsey said in a statement.

However, campaigners such as the Fair Deal Coalition also feared the New Zealand government could yet make concessions in order to gain access to U.S. markets for the country's pillar dairy and agriculture sectors in the distant future.

"If we accept what the United States has put on the table, then this country would be severely limiting future opportunities to innovate, remix, create and distribute content. In short, New Zealand would be trading away our digital future -- all for potentially improved access to U.S. markets, which could take years and years to happen," coalition spokesperson Susan Chalmers said in a statement.

"The long term economic prospects New Zealanders can build with fair intellectual property law will be damaged if the TPP goes ahead with this intellectual property chapter in place."

New Zealand's copyright framework and its ability to adjust copyright as its digital economy evolved were crucial to the country's economic future, said the Internet New Zealand group.

Chief executive Jordan Carter said it was a credit to Trade Minister Tim Groser and the government that they had taken an " intelligent stance," and he hoped the government would stay true as 11th hour negotiations drew near.

"Any horse trading to get the TPP over the line must not sacrifice the huge economic opportunity presented by digital exports," Carter said in a statement.