Labour is calling on the Government to be more transparent about when the final sign-off of the Trans-Pacific Partnership is likely to occur.
A Chilean government spokesperson said the controversial free trade agreement would be signed off on February 4.
Duty minister Simon Bridges said many countries were not in a position to ratify the agreement, and no final date had been set.
But Labour leader Andrew Little said American officials have told him all signatories are also working towards the February 4 date.
He said the New Zealand Government is in control of the text and the signing of it, and should not be keeping the date of the signing secret.