http://www.odi.org.uk/resources/details.asp?id=100&title=east-african-integration-can-contribute-east-african-development (0% raw, 10% intermediate, 25% max finished + VAT)
http://en.wikipedia.org/wiki/African_Economic_Community
Ghana Customs
http://www.ghanacustoms.gov.gh
http://www.ghanacustoms.gov.gh/Chapter%2085.pdf (20% import duty + 12.5% VAT on duty-inclusive)
http://www.docstoc.com/docs/9111406/2008-National-Trade-Estimate-Report---Ghana (mentions 2.5% National Health Insurance levy + 0.5% non-ECOWAS imports + 0.4% for use of Ghana Community Network (GCN) automated clearing system + 0.5% on non-petroleum products under Export Development and Investment Fund Act). 36.5% (or maybe 40% with compounding)
Ghana Free Zone Board
http://www.gfzb.com.gh/ (at least 70% of assembled goods must be exported)
Nigeria Customs
http://www.customs.gov.ng
http://www.customs.gov.ng/Tariff/index.php
http://www.customs.gov.ng/Tariff/CET_tariff.xls (20% import duty + 5% VAT)
