representatives not voting. Controversy arose over this vote because it was held open 1 hour and 45 minutes longer than the normal 15 minutes in order to get some members to change their votes. For procedural reasons, the Senate took a second vote on CAFTA on July 28 and the pact garnered an additional vote from Sen. Joe Lieberman—who had been absent on June 30—in favor of the agreement. The implementing legislation became Public Law 109-053 when it was signed by Bush on August 2, 2005. The Dominican Republic, Costa Rica, El Salvador, Guatemala, Nicaragua, and Honduras have also approved the agreement. They are all the current members of CAFTA-DR. El Salvador became the first country to formally implement CAFTA, which went into effect on March 1, 2006, when the Organization of American States (OAS) received signed copies of the treaty. On April 1, 2006, Honduras and Nicaragua fully implemented the agreement. On May 18, 2006, the Congress of Guatemala ratified CAFTA-DR, which went into effect on July 1, 2006. The Dominican Republic implemented the agreement on March 1, 2007. In a referendum on October 7, 2007, Costa Rica narrowly backed the free trade agreement, with 51.6% voting "Yes"; the agreement took effect on January 1, 2009. Chile President Bush signed the United States-Chile Free Trade Agreement signed on June 6, 2003. The pact came into force on January 1, 2004. On that date, tariffs on 90% of U.S. exports to Chile and 95% of Chilean exports to the United States were eliminated. The agreement also established that Chile and the U.S. will establish duty-free trade in all products within a maximum of 12 years (2016). In 2009, bilateral trade between the United States and Chile reached US$15.4 billion, a 141% increase over bilateral trade levels before the U.S.-Chile FTA took effect. In particular, U.S. exports to Chile in 2009 showed a 248% increase over pre-FTA levels. Mexico During Fox's administration, Mexico pushed for "comprehensive" reform of U.S. immigration law that addressed the problem of Illegal immigration to the United States. The issue had been called "The Whole Enchilada" by Fox's administration, which stated that "immigration reform in the United States should address mutual border problems, the rights of undocumented immigrants, and the development of regions in Mexico that 'expel' migrants". However, according to former U.S. ambassador to Mexico Jeffrey Davidow, all discussions between the parties on immigration were informal.