Other Lutherans, especially Confessional Lutherans, maintain that this agreement fails to properly define the meaning of faith, sin, and other essential terms and thus do not support the Lutheran World Federation's agreement. Likewise, Catholics affirming the real and serious differences between the decrees of the Council of Trent and the normative Lutheran documents collected in the 1580 Book of Concord equally reject the 1999 "JDDJ" as fatally flawed. In July 2006 the World Methodist Council, representing 70 million Wesleyan Christians, including The United Methodist Church, "signed on" to the Joint Declaration on Justification between Roman Catholics and the Lutheran World Federation.