Question: Are not any of the current elders under consideration for the position? If not... Why?
I would need to look at the BCO, but the PCA breaks elders into Teaching Elders and Ruling Elders. Except for a very few cases, a Teaching Elder should be seminary trained and take a comprehensive ordination exam before being ordained to the gospel ministry. The Ruling Elders are ordained as REs, but not as a TEs. None of our REs senses a call to the gospel (pastoral) ministry.
Does that answer your question.