The African Growth and Opportunity Act (AGOA) was signed into law on May 18, 2000. It is a US Trade Act that provides unilateral tariff preferences into the US market to 39 Sub-Saharan African countries. AGOA is an expansion of the existing (duty-free) benefits previously available only under the Generalised System of Preferences (GSP) programme. Together AGOA and the GSP programme provides duty-free access to the U.S. market for approximately 7,000 product tariff lines, including around 1,800 product tariff lines that were added to the GSP by the AGOA legislation.