SADC deals with trade in services through various protocols, including protocols on communication, transport, energy, education, tourism, finance and investment, and a draft protocol on the movement of persons. The Finance and Investment Protocol covers investment, taxation, exchange control policies, central bank cooperation, payment systems, banking regulation, development finance institutions, non-banking financial institutions, and stock exchanges. The SADC Services Protocol models the WTO GATS and includes six priority sectors for negotiations: communication, construction, energy, financial, tourism, and transport services. Negotiations are ongoing using a request-offer approach but there have only been a few offers so far.