The structure of ALA has changed overtime. The division structure started in 1939 with the Third Activities Committee. Some committees, working groups, and round tables already existed before the divisions.
Library Bill of Rights is adopted the same year.
The ALA Code of Ethics was adopted in 1939
"Adopted at the 1939 Midwinter Meeting by the ALA Council; amended June 30, 1981; June 28, 1995; and January 22, 2008.
As members of the American Library Association, we recognize the importance of codifying and making known to the profession and to the general public the ethical principles that guide the work of librarians, other professionals providing information services, library trustees and library staffs.