The Word of God in the Old and New Testaments is the only infallible rule of faith and practice, and is the supreme standard of the Church.  The Presbyterian Church in Ireland has also adopted subordinate/secondary standards.  In these are found what the Church understands the Word of God to teach on certain important points of doctrine and worship.  These subordinate standards are a testimony for truth and against error, and serve as a bond of union for members of the Church.

The Confession of Faith (as approved by the Church of Scotland in 1647), and the Larger and Shorter Catechisms, prepared by the Westminster Assembly of Divines, are the subordinate standards of the Presbyterian Church in Ireland.

Oddly, despite their immense importance, the website of the Presbyterian Church in Ireland contains almost nothing about these subordinate standards.  Therefore, the links provided here are to a website of the Presbyterian Church in America (PCA).