Pub. L. 93-445, tit. II, sec. 210

Sec. 210. The election of a joint and survivor annuity made before July 31, 1946, by an individual to whom an annuity accrues under the Railroad Retirement Act of 1937 before January 1, 1975, shall be given effect as though the provisions of law under which the election was made had continued to be operative unless such election had been revoked prior to the time the annuity of such individual began to accrue.