[[File:Union of Utrecht.png|thumb|Red areas - full members of the Union of Utrecht Pink areas - dependent jurisdictions Orange - former dependent jurisdictions]] The Bonn Agreement of July 2, 1931 is a formal affirmation which established full communion between the Church of England and the Old Catholic churches of the Union of Utrecht, including the Old Catholic Church of the Netherlands. While it allowed bilateral participation in sacraments, it does not require from either the acceptance of all doctrinal opinions. This communion has since been extended to all churches of the Anglican Communion through their synods.

Principles

The agreement expresses three principles: To monitor the progressive growing together of the two communions, the Anglican-Old Catholic International Co-ordinating Council was established by the International Bishops' Conference and the Lambeth Conference. Its first official meeting took place in 1999.