When was the committee on negro baseball leagues formed?

The National Baseball Hall of Fame Committee on Negro Baseball Leagues was formed on June 10, 1971. To be considered for election, a player had to have played at least ten years in the pre-1946 Negro Leagues and/or Major League Baseball and was not eligible for BBWAA selection. The nine-member committee elected one new member from the Negro Leagues each year between 1971 and 1977. The committee was dissolved and voting was taken on by the Veterans Committee.