The country presented its request Thursday to become a full member of the Pacific Alliance.
Representatives of the four countries that make up the Latin trade bloc and observers are meeting in Cali, Colombia.
The Costa Rican foreign ministry said that the country’s request was met with approval by the group and that the country would begin the paperwork to become a full member.
The other countries are Perú, Colombia, Chile and México. The trade pact was formed in 2011. Costa Rica met the requirements when it formally signed a free trade treaty with Colombia, also at the summit session Wednesday.
Costa Rica already has individual trade agreements with some of the countries.