“This arrangement ought, as far as possible, to be commonly observed, that every one, content with his own limits, may not encroach on another’s province. Nor is this a human invention. It is an ordinance of God. For we read that Paul and Barnabas appointed presbyters over each of the churches of Lystra, Antioch, and Iconium (Acts 14:23); and Paul himself enjoins Titus to ordain presbyters in every town (Titus 1:5). In like manner, he mentions the bishops of the Philippians, and Archippus, the bishop of the Colossians (Phil 1:1; Col 4:17). And in the Acts we have his celebrated address to the presbyters of the Church of Ephesus (Acts 20:28). Let every one, then, who undertakes the government and care of one church, know that he is bound by this law of divine vocation, not that he is astricted to the soil (as lawyers speak), that is, enslaved, and, as it were, fixed, as to be unable to move a foot if public utility so require, and the thing is done duly and in order; but he who has been called to one place ought not to think of removing, nor seek to be set free when he deems it for his own advantage. Again, if it is expedient for any one to be transferred to another place, he ought not to attempt it of his own private motive, but to wait for public authority.”
John Calvin, Institutes of the Christian Religion, Vol. II, pp. 321
West Port Experiment 