The deal is ready to be signed into law, but Mr Bush plans to tie its ratification to approval of TPA, in an omnibus trade bill.
Obama is in Hangzhou for a meeting of the Group of 20 and Ban flew there so that the American and Chinese leaders could formally deposit their "instruments" of ratification or approval of the agreement with the United Nations.
In the United States, ratification involves approval of two-thirds of the Senate, a body that is not particularly keen on entering into treaties.
In accordance with Article 28, the Treaty entered into force on the ninetieth day after the deposit of the fortieth instrument of ratification, acceptance, approval or accession on 29 June 2004.
The Agreement will enter into force following the submission of the twenty-fifth instrument of ratification, acceptance, approval or accession.
The COP21 Agreement will enter into force on the thirtieth day after the date on which at least 55 Parties (out of 197) to the Convention accounting in total for at least an estimated 55% of the total global greenhouse gas emissions have deposited their instruments of ratification, acceptance, approval or accession with the UN Depositary.
The treaty has the support of President Bush, but ratification requires approval by two-thirds of the Senate.
So far, 61 countries have deposited their instruments of ratification, acceptance or approval, accounting for 47.8% of global emissions, an Indian government statement said.
Instruments of ratification, acceptance, or approval are deposited with the Director-General of FAO.
While 195 countries adopted the Agreement last year, it will actually enter into force when 55 countries accounting for at least 55percentt of global greenhouse gas emissions join by approving it domestically and submitting their "instrument of ratification, acceptance or approval" to the UN.
The statement continued: "Subject to the ratification of legal agreements and Football League approval being granted, the club hope to be finalise the takeover early next month.
