Introduction
One of the major developments of the last two decades that international trade has experienced (apart from the advent of electronic commerce) has been the dramatic increase in regional trade agreements (RTAs). Between 1948 and 1994 there were only 124 RTA notifications whereas between 1995 and 2008 this figure more than tripled, with an additional 300 notifications (WTO 2009).
The African Continent has not escaped the proliferation of regional trade agreements in the existing global trade regime. The formation of RTAs in Africa has mainly been championed by what are commonly known as Regional Economic Communities (RECs) as the continent moves towards the formation of the African Economic Community (AEC) that was established by the Abuja Treaty of 1991. Almost all the RECs have RTAs in the form of free trade. To date, COMESA has already launched its own customs union and ECOWAS is preparing to do the same. ECCAS and SADC each have their respective free trade areas and both are planning to launch their customs unions. Although the CEN-SAD is currently at the stage of a free trade zone it has not yet elaborated a distinct road map to strengthen integration amongst its Member States. The EAC has also reached the stage of a customs union which was launched in January 2005. Zimbabwe in particular has joined several of these trade agreements and among them are some Free Trade Areas (FTAs). At the moment there are negotiations which if are successful may see Zimbabwe joining the Southern African Customs Union (SACU).
Despite this development, not all Member States of RECs have signed up to these agreements because the principle of ‘variable geometry’ has been widely applied. Whilst this may be a major challenge to the rapid evolution of FTAs to customs unions within the RECs, it grants countries