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 to the Kickapoo Indians of Kansas, which trust period expires during the calendar year 1931, be, and the same is hereby, further extended for a period of 10 years.
Context
Executive Order 5626—Extension of Trust Period on Allotments of Kickapoo Indians of Kansas
05/17/1931