Purpose of this Session
Although an elder may also function in a five fold gift ministry, or a five fold gift ministry be appointed as an elder, it is not always the case. One could be an apostle yet still be subject to the authority of the group of elders in a local church, and one can be an elder and not be a five fold gift ministry.
This does not mean that the elders are to control the church and its ministries, but rather that there are proper checks and balances, and a plurality of anointed leadership in a local congregation.
The elders in a locality throughout the New Testament are shown to be the authority in that church, not the five fold.
Although the five fold work together with the local elders for the edification of the church, it is the elders that bear the ultimate authority and responsibility for the house of God at a local level.