In 2022, the General Convention of The Episcopal Church approved a first reading of a constitutional change to define the Book of Common Prayer (BCP) as inclusive of all the liturgical texts that have been authorized for use or made available by General Convention.
The second reading of this constitutional change was adopted in July 2024. You can read “Article X” here and below.
All authorized Episcopal liturgies are compiled at episcopalcommonprayer.org, which was created by the Task Force on Liturgical and Prayer Book Revision.
Article X: Of The Book of Common Prayer of the Constitution of the General Convention
The Book of Common Prayer, as now established or hereafter amended by the authority of this Church, shall be in use in all the Dioceses of this Church. No alteration thereof or addition thereto shall be made unless the same shall be first proposed in one regular meeting of the General Convention and by a resolve thereof be sent within six months to the Secretary of the Convention of every Diocese, to be made known to the Diocesan Convention at its next meeting, and be adopted by the General Convention at its next succeeding regular meeting by a majority of all Bishops, excluding retired Bishops not present, of the whole number of Bishops entitled to vote in the House of Bishops, and by a vote by orders in the House of Deputies in accordance with Article I, Sec. 5, except that concurrence by the orders shall require the affirmative vote in each order by a majority of the Dioceses entitled to representation in the House of Deputies.
But notwithstanding anything herein above contained, the General Convention may at any one meeting, by a majority of the whole number of the Bishops entitled to vote in the House of Bishops, and by a majority of the Clerical and Lay Deputies of all the Dioceses entitled to representation in the House of Deputies, voting by orders as previously set forth in this Article:
a. Amend the Table of Lessons and all Tables and Rubrics relating to the Psalms.
b. Authorize for trial use throughout this Church, as an alternative at any time or times to the established Book of Common Prayer or to any section or Office thereof, a proposed revision of the whole Book or of any portion thereof, duly undertaken by the General Convention.
c. Authorize for use throughout this Church, as provided by Canon, alternative and additional liturgies to supplement those provided in the Book of Common Prayer.
And that nothing in this Article shall be construed as restricting the authority of the Bishops of this Church to take such order as may be permitted by the Rubrics of the Book of Common Prayer or by the Canons of the General Convention for the use of special forms of worship.