Scott Bushey
Puritanboard Commissioner
In the OPC Book Of Church Order, in the chapter dealing with the Sacraments, there is no distinction made as to what substance the element consists of. "The cup" is the only reference to that element of the Sacrament. I think 'we', the congregation, have to rely on our Pastors and Elders to provide the correct elements and procedure for the Lord's Supper. Assuming that the OPC, and its officers allow one, the other, or both, I would think I can have confidence that I am indeed partaking of the Sacrament.
Jimmy,
The standards for the OPC is the WCF and it states clearly a number of times, “wine”.