Executive Order 5206—Establishing Oroville, Washington as a Customs Port of Entry
By virtue of the authority vested in me by the Act of Congress approved August 1, 1914, making appropriations for the sundry civil expenses of the Government for the fiscal year ended June 30, 1915, the Customs station of Oroville, Washington, is hereby created a port of entry in Customs Collection District No. 30 (Washington) with headquarters at Seattle, Washington, effective thirty days from the date of this order.
The White House,
October 11, 1929.
Herbert Hoover, Executive Order 5206—Establishing Oroville, Washington as a Customs Port of Entry Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/360903