Executive Order 5764—Amendment of Civil-Service Rule V
Civil-Service Rule V, section 4, is hereby amended by the addition of the following subsection lettered (g):
(g) Where there are already two members of the applicant's family in the public service in the grades covered by the Civil-Service Act.
The White House,
December 22, 1931.
Herbert Hoover, Executive Order 5764—Amendment of Civil-Service Rule V Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/361328