§ 115. Reformed Presbyterian churches, changing system of choosing trustees; pew rents and minister's salary. If any incorporated Reformed Presbyterian church, at a meeting of the church or congregation, determine that the deacons of such church shall be the trustees thereof, then the deacons of such church actively engaged in the exercise of their offices therein, and their successors in office, shall, by virtue of their respective offices, be the trustees of such church. The salary of the minister and the pew rents in any such church shall be fixed by the vote of the congregation, and the trustees shall not fix or change the same.