The text of the deal, which is 1,600 pages long, was published and now the long ratification process will begin, amid lingering concerns from some EU member states.
Germany, in particular, has pressed for a contentious arbitration mechanism to be excluded from both the Canada deal and an eventual EU-US Transatlantic Trade and Investment Partnership.
The "investor-state dispute settlement" provision will allow private investors to sue governments if they feel local laws threatened their investments, and idea opposed in Berlin.
But EU Trade Commissioner Karel De Gucht warned a German newspaper on Thursday that no changes can be made to the deal without killing it.
"If we re-open negotiations on CETA (the Comprehensive Economic and Trade Agreement), the deal will be dead," De Gucht told the daily Frankfurter Allgemeine Zeitung on Thursday.
At a joint press conference in Ottawa yesterday with European Council President Herman Van Rompuy and Canadian Prime Minister Stephen Harper, EU Commission President Jose Manuel Barroso said the pact "was fully backed by all member states of the European Union including Germany."
Canada, meanwhile, pledged in a statement to remove its visa requirement on Bulgarian and Romanian travellers "as soon as possible."
After the text is translated into 23 languages and the wording is scrutinized for accuracy by lawyers, CETA will be signed next year and come into force in 2016, Barroso said.
The pact will eliminate 98 percent of tariffs on goods and services, increase cross-Atlantic worker mobility and harmonize professional qualifications.
Hundreds of millions of dollars in duties will be eliminated.
