Herbert Hoover actually said...
It is hereby ordered, under authority contained in section 5 of the act of February 8, 1887 (24 Stat. 388-389), that the trust period on allotments made in favor of Indians of the Warm Springs Reservation, Oreg., which trust period expires during the calendar year 1931, be, and the same is hereby, extended for a period of 10 years.
Context
Executive Order 5734—Extension of Trust Period on Allotments of the Warm Springs Reservation, Oregon
10/16/1931