El President Russell M. Nelson announced two important organizational changes on Saturday night, designed to help Latter-day Saints in congregations around the world minister more like Jesus Christ.

"Tonight we announce a significant restructuring of our priesthood quorums of Melchizedek to do the Lord's work more effectively, "said the President Nelson during the general session of the priesthood at the Conference Center in the Temple Square. "In each neighborhood, the high priests and elders will now be combined into a single quorum of elders. . . [and] the composition of the quorum [of the high priests] will be based on the current callings of the priesthood. "

The priesthood of the Church of Jesus Christ of Latter-day Saints is divided into two levels: the Aaronic Priesthood and the Priesthood of Melchizedek. The elder and the high priest are two of the offices of the priesthood in the Priesthood of Melchizedek.

El President Nelson, who became the 17 president of the 14 Church in January, said the merger of the two priesthood groups into a single quorum has been worked on, revised and refined for many months. The key reason for the change, he said, is the need for a more effective ministry.
"We feel the imperative need to improve the way we care for our members," he said. "To do better, we need to strengthen our quorums of the priesthood to give more direction to the ministry of love and support that the Lord wants for His saints. These adjustments are inspired by the Lord. As we implement them, we will be even more effective than we were before. "
Elders D. Todd Christofferson and Ronald A. Rasband also provided additional aspects of this important change. You can find more information in the excellent coverage of the Mormon Lighthouse about the restructuring of priesthood quorums.