Sacraments and Ruling (Lay) Elders

Modified from a text conversation.

Why should only Teaching Elders (pastors) and not Ruling Elders (lay elders) administer the sacraments? Why are the sacraments (normally) not properly administered otherwise? Here are the broad strokes of my reasoning, with particular application to the EPC. A more detailed breakdown can be found on pages 30-38 of the document linked in this post.

Biblical theology: The sacraments are part of the churchly ministry granted to the apostles (e.g. Matthew 16:19, 18:18-19, 28:19; John 20:23; 1 Corinthians 4:1, 11:23). The authority to administer sacraments is not entrusted to just anyone in the church. Teaching Elders as pastors stand in continuity with this apostolic ministry (i.e. apostolic succession) – e.g. Romans 15:15-17; 1 Corinthians 12:27-29, 14:1; Ephesians 2:20-22, 3:7, 4:9-11; 1 Peter 5:1. Whatever Ruling Elders are, they are not an apostolic, sacramental office. Pastors (or bishops, or ministers, or Teaching Elders, or whatever your preferred term) do stand in ministerial, apostolic succession, and therefore do have a sacramental nature to their office. Teaching Elders have been authorized by Christ to administer the sacraments, Ruling Elders have not…