Membership in the Salt Lake Tabernacle Choir was so important that Bishops and Stake Presidents are asked not to call members to additional Church duties unless such duties will not interfere with Choir duties. ". . . membership in the Tabernacle Choir will take precedence over any other assignment."
[1939-September 28-Original circular letter, L.D.S. in Clark, James R., Messages of the First Presidency (6 volumes)]