In the congregational form of church government (see Matthew 18.15-20), the church meeting acts as the final court of appeal. The elders, or leaders, have a certain authority in the church (Heb. 13.17), but it is an authority subject to the word of God and to the church. Hence it is the gathered church which appoints elders and to whom they must answer if they go astray (1 Tim. 5.19, 20). So the church meeting provides a mechanism for checking and balancing the leadership’s power. It is, I suppose, similar to the House of Lords, which can return Parliamentary Bills to the Commons with the message to ‘think again’.