Church leaders had authority to

Bind and loose

Matthew 16:18-19

18 And I tell you that you are Peter, and on this rock I will build my church, and the gates of Hades will not overcome it.

19 I will give you the keys of the kingdom of heaven; whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven.”

Matthew 18:18

“I tell you the truth, whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven.

John 20:22-23

22 And with that he breathed on them and said, “Receive the Holy Spirit.

23 If you forgive anyone his sins, they are forgiven; if you do not forgive them, they are not forgiven.”

Rule churches

Hebrews 13:7

Remember your leaders, who spoke the word of God to you. Consider the outcome of their way of life and imitate their faith.

Hebrews 13:17

Obey your leaders and submit to their authority. They keep watch over you as men who must give an account. Obey them so that their work will be a joy, not a burden, for that would be of no advantage to you.

Oversee the work in general

Please read - Acts 15

Acts 20:28

Keep watch over yourselves and all the flock of which the Holy Spirit has made you overseers. Be shepherds of the church of God, which he bought with his own blood.

2 Corinthians 11:28

Besides everything else, I face daily the pressure of my concern for all the churches.

Please read - Gal 3:1-15