I see. The presbytery is responsible for the ordination of ministers, and ordinarily you cannot come under care of a presbytery to prepare for licensure and/or ordination unless you are a member of a local church within that presbytery. I've heard of exceptions for men coming under care in a presbytery who are members of churches outside the presbytery (but still within the denomination), but I don't think I've heard of anyone coming under care who is a member of another denomination. Usually, you either join a local church and then come under care. Or you get licensed in your original presbytery, then join a new local church and transfer your license into the new presbytery as well. Once you are ordained, it is simpler, since ministers are considered members of the presbytery and can transfer their credentials over to the new presbytery when they are called by a congregation within that new presbytery. Hope that makes sense.