IIThe principal subordinate standard of the Church of Scotland is the Westminster Confession of Faith approved by the General Assembly of 1647, containing the sum and substance of the Faith of the Reformed Church. Its government is Presbyterian, and is exercised through Kirk-sessions, Presbyteries, Provincial Synods, and General Assemblies. Its system and principles of - worship, orders, and discipline are in accordance with " The Directory for the Public Worship of God," "The Form of Presbyterial Church Government," and " The Form of Process," as these have been or may hereafter be interpreted or modified by Acts of the General Assembly or by consuetude.