Legislation to implement the new U.S.-Canadian trade pact is in White House hands with the approval of key House and Senate committees, marking another step toward reduction of economic barriers between the allies. "This is a historic moment," declared Sen. Lloyd Bentsen, chairman of the Finance Committee and newly named Democratic vice presidential candidate, just before his panel passed the legislation unanimously Thursday. "We can set an example for the entire world of what can be accomplished by free trade," the Texas senator said. The House Ways and Means Committee followed the Senate action by also adopting the measure unanimously. The U.S.-Canada Free Trade Agreement calls for eliminating tariffs between their countries during the next 10 years.