Parliament has opened with PM John Key voicing support for the Trans-Pacific Partnership (TPP).
Government signed the free trade agreement in Auckland last week, it's now in Parliament's hands.
"What a tremendous trade deal for New Zealand," Mr Key said in his opening speech today.
Mr Key described criticism of some parts of the TPP as "myths".
He scorned Labour's opposition to the agreement, calling it "the two position party".
Labour leader Andrew Little kicked off the debate that's expected to continue for the rest of Parliament's first day.
He said the Government's handling of the TPP had been "diabolical".
In the House today, the final text of the TPP free trade deal has been presented to Parliament where it will go through the treaty examination process.