The Savoy Declaration authors adopted, with a few alterations, the doctrinal definitions of the Westminster confession, reconstructing only the part relating to church government; the main effect of the Declaration of the Savoy assembly was to confirm the Westminster theology. There was the addition of a new chapter entitled Of the Gospel, and of the Extent of the Grace Thereof. Other changes include a replacement to chapters 30 and 31 of the Westminster Confession concerned with Congregational church government.
The Savoy Declaration authors adapted, with some modifications, the doctrinal definitions of the Westminster Confession, focusing solely on church governance; the primary impact of the Savoy assembly's declaration was to affirm Westminster theology. The document included a new chapter titled "Of the Gospel and the Extent of Grace Thereof." Other alterations involved replacing chapters 30 and 31 of the Westminster Confession concerning Congregational church government.