The Belgic Confession in Article 31 on The Ministers, Elders and Deacons says this; We believe that the ministers of Gods Word, the elders, and the deacons ought to be chosen to their respective offices by a lawful election by the Church, with calling upon the name of the Lord, and in that order which the Word of God teaches. Therefore every one must take heed not to intrude himself by improper means, but is bound to wait till it shall please God to call him; that he may have testimony of his calling, and be certain and assured that it is of the Lord. Here we see that elders and deacons are to be chosen to their respective offices. They must take heed not to intrude on the office, but in due time, as God, through the church, they may be called to function in those offices. These officers are to be defined and installed by biblical standards. 1 Timothy 3 and Titus 1 demonstrate the non-negotiable character of the minister of the Gospel, and the deacon. Most of what is listed in those two areas relate to the character of the men, though we know from those passage and others that elders are to be apt to teach and are the heralds of the Word of God (2 Tim. 2:24Open in Logos Bible Software (if available)). By authoritative extension, elders or pastors are to baptize (Matthew 28:19Open in Logos Bible Software (if available)), administer the Lords Supper (1 Cor. 11:1ffOpen in Logos Bible Software (if available)), and give themselves wholly to ministry of the Word and prayer (Acts 6:4Open in Logos Bible Software (if available)).