WEC identifies five key ministry areas needed for the sending of cross-cultural missionaries: advocacy, communication, ownership, finance, and prayer. Each of these areas are fulfilled through a combination of sending church and WEC resources. A church may include particular skills, for example, financial planners who can help their cross-cultural church planters. If not WEC can help meet that need through its network. When a missionary is sent with WEC, a 'Sending Agreement' is drawn up to help each party (the church, the missionary & WEC) to understand their roles and expectations and see that these areas are covered.