Executive Order—Amendment of Civil Service Rules
Special Customs Rule No. I is hereby amended by adding thereto the following:
In the customs district of New York: Detectives employed exclusively as such.
Approved, March 10, 1890.
Benjamin Harrison, Executive Order—Amendment of Civil Service Rules Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/205257