I found a link to this at Real Clear Religion. It appears to be a very recent statement from the Church, and more or less blames Brigham Young's pronouncement that Blacks could not receive the priesthood on the prevalent cultural realities of his era. https://www.lds.org/topics/race-and-the-priesthood?lang=eng The Real Clear Politics article indicated that this statement is being well-received--a "Christmas Present" to LDS of all ethnicities. Mormon church traces black priesthood ban to Brigham Young | The Salt Lake Tribune