In 1957, after "months of prayer", Eldresses Gertrude, Emma, and Ida, the leaders of the United Society of Believers and who were based out of Canterbury, voted to close the Shaker Covenant, the document which all new members need to sign to become members of the Shakers. In 1988, speaking about the three men and women in their 20s and 30s who had joined the Shakers and were living in the Sabbathday Lake Shaker Village, Eldress Bertha Lindsay stated, "To become a Shaker you have to sign a legal document taking the necessary vows and that document, the official covenant, is locked up in our safe. Membership is closed forever."