A week ahead of the signing of the Trans Pacific Partnership agreement, and amid criticism of the deal, the government has released new details of the agreement.

It has revealed at least eight laws are going to have to be changed – including the Overseas Investment Act, the Copyright Act and the Tariff Act.

Trade Minister Todd McClay has released 10 fact sheets about the economic benefits the detail adds to the economy.

It confirms it'll add an estimated $270m to the economy in tariff reductions within 10 years of the deal being implemented.