In a statement released by the Presiding Bishop's office October 16, JeffertsSchori cited Title III, Section 7 of the Canons: "I have accepted the renunciation of the Ordained Ministry of this Church, made in writing to me in July 2009 by the Rt. Rev. Keith L. Ackerman, Bishop of Quincy, Resigned who is, therefore, removed from the Ordained Ministry of this Church and released from the obligations of all Ministerial offices, and is deprived of the right to exercise the gifts and spiritual authority as a Minister of God's Word and Sacraments conferred on him in Ordinations.”
According to the statement, Jefferts Schori had thanked Ackerman in an October 7 letter "for your follow up note regarding your plans to function as a bishop in the Diocese of Bolivia in the Province of the Southern Cone. As you know, there is no provision for transferring a bishop to another Province. I am therefore releasing you from the obligations of ordained ministry in this Church.”
The full text of the her October 7 letter may be read here.
He had maintained his position as a retired TEC bishop specifically so that he could continue to provide confirmations, dedications, chrism masses, etc. for FiF churches in TEC (only at the invitation of the ordinary, of course). In case Dr. Schori isn't familiar with these functions, this is what bishops do in the church.
I think the most that can be said about her unilateral action is that Bp. Keith is no longer under any obligation to advocate for the Millenium Developmental Goals. Now he can get back to praying for God's reign, rather than trying to pretend.