What does Evangelical Free Mean?

The below is an excerpt from efca.org
The term "Evangelical" refers to our faith, our theology. We are committed to the proclamation of the Gospel, the good news of Jesus Christ, and to the Scriptures as being the inspired, inerrant, authoritative and sufficient Word of God.
The term "Free" refers to our polity, our structure and organization. We are committed to a congregational form of government.