Good question, Meg. And also why a particular Session would want them as well.

Hi Benjamin

Individual Sessions can be more picky than the denominational minimum standards. For instance, a Session may not allow theonomists as officers, even though the denomination as a whole allows them. A good reference for things like that is the PCA historical section, which has an area for position papers. The position papers for Creationism are good reading:

PCA Historical Center: Index to the Position Papers of the Presbyterian Church in America

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Tim Vaughan, 48 years old, member PCA church but currently attending EV Free church. San Luis Obispo County, California.