Book of Concord
When the Conference separated from the SAS in 1870, another church body also split from the SAS, the Norwegian-Danish Augustana Synod in America (NAS). The difference between the NAS and the Conference was the inclusion of the Book of Concord. The NAS wanted to include the entire Book of Concord as the confessional base. The Conference wanted to use only the three ecumenical creeds, Luther's Small Catechism, and the Unaltered Augsburg Confession.