[First Presidency to Stake Presidents]
... At a recent meeting of the First Presidency and the Council of the Twelve it was decided that women who are in good standing in the Church and have been faithful and devoted members, but whose husbands are not members of the Church or are not worthy of a temple recommend, may, with the written consent of their husbands, be granted the privilege of receiving their endowments and doing temple work for the dead. The written statement of the husband should be presented at the temple together with the usual temple recommend from the Bishop of the Ward and the President of the Stake, and filed with the recommend. We neither urge nor request women to take advantage of this ruling, and it is a privilege that should be given to those only who have proven themselves worthy and are desirous of receiving these blessings.
[Source: Heber J. Grant, Anthony W. Ivins, and J. Reuben Clark Jr. to Stake Presidents, Apr. 17, 1933, in Anderson, Devery; The Development of LDS Temple Worship, 1846-2000: A Documentary History, http://amzn.to/TempleWorship]