1 (3). Of the prescribed form of divine service.

That form of liturgy and divine service which is comprised in the book of common prayer and administration of the sacraments, or which may be otherwise prescribed by the lawful authority of the Church of Ireland, and no other, shall be used in the churches of the same.

[On 3 May 1945 there was a lengthy addition to this canon, as follows:

Provided that, subject as herein provided, it shall be lawful to hold in a church or cathedral of the Church of Ireland a special service at which a recognized minister of a Christian denomination other than the Church of Ireland or a church in communion therewith may deliver an address, but so that

a. express permission shall have been given by the ordinary for the holding of such service and the delivery of such address,

b. such permission shall not be given unless the ordinary has been satisfied that both the incumbent and the churchwardens of the church concerned so desire,

c. such special service shall not be in substitution for any of the prescribed services of the Church of Ireland,

d. the form of such service and the mode in which it is used shall be approved by the ordinary, and

e. such permission shall be given at the discretion of the ordinary, and only

1. upon a notable occasion of a public or supra-denominational kind, whether national, civic or in connection with social welfare; or

2. in respect of an interdenominational service having for its object the reunion of the churches, or in connection with foreign missions.

This was deleted on 17 May 1962 and replaced by the following:

A minister or accredited preacher of such Christian denominations not in full communion with the Church of Ireland as may from time to time be specified by the house of bishops may, with the permission of the bishop or other the ordinary, in such circumstances as may from time to time be prescribed by the house of bishops, deliver an address in any church or cathedral of the Church of Ireland at a service other than holy communion, which permission shall be without prejudice to the normal maintenance of the recognized rules of church order.