Afghanistan joined the World Trade Organization (WTO) on Friday as the 164th country to do so, officials said.
The upper house came together at the request of President Ashraf Ghani on Wednesday "to adopt another six laws that apply as a condition for membership," said Mussafer Qoqandi, a spokesman for the Ministry of Economy and Industry.
Afghanistan first applied for WTO membership in 2004, the organization said.
The country is one of the poorest in the world and its economy is mainly based on agriculture. The strongest industry is the illicit cultivation of poppy and drug production.
Afghanistan is rich in mineral resources such as copper, chromium and iron, and precious stones such as lapis lazuli, but the rapidly deteriorating security situation discourages investment.
Afghan Economy Minister Humayun Rasa has said that WTO membership will help Afghanistan strengthen its rule of law, establish transparency and lay the foundations for healthy economic growth.