March 10, 1890
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.
BENJ. HARRISON.
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