as the Lamu Port is underway. It is expected to cost US$22 billion, which will make it the biggest port in all of Africa. Upon completion the Bagamoyo port under construction in Tanzania will be the second largest port in Africa, with a capacity to handle 18.9 million cargo containers a year. Business and finance Many of the EAC's largest firms are headquartered in Nairobi, including Kenya Airways, the Nation Media Group, and the Kenya Commercial Bank Group. The multinational firms with their regional headquarters in Nairobi include Google, Coca-Cola, and Toyota. The city is also home to the Nairobi Securities Exchange. According to a 2007 published report, it is Africa's fourth largest in terms of trading volumes and fifth largest in terms of market capitalization as a percentage of gross domestic product. Plans The new treaty was proposed with plans drawn up in 2004 to introduce a monetary union with a common currency, the East African shilling, some time between 2012 and 2015. There were also plans for a political union, the East African Federation, with a common President (initially on a rotation basis) and a common parliament by 2010. However, some experts like those based in the public think tank Kenya Institute of Public Policy Research and Analysis (KIPPRA), noted that the plans were too ambitious to be met by 2010 because a number of political, social and economic challenges are yet to be addressed. The proposal was the subject of National Consultative discussions, and a final decision was to be taken by the EAC Heads of State in mid-2007. In 2013, a protocol was signed outlining their plans for launching a monetary union within 10 years. In September 2018, a committee was formed to begin the process of drafting a regional constitution. In January 2023, the East African Community (EAC) plans to issue a single currency within the next four years. The Council of Ministers of the organization must decide on the location of the East African Monetary Institute and the establishment of a roadmap for the issuance of the single currency. Single tourist visa It had been hoped that an East African Single Tourist Visa may have been ready for November 2006, if it was approved by the relevant sectoral authorities under the EAC's integration programme. Had it been approved, the visa would have been valid for all three current member states of the EAC (Kenya,