The H.R. 2516 legislation was passed by the 90th U.S. Congressional session .
The H.R. 2516 legislation was endorsed by the 36th President of the United States Lyndon Johnson on April 11 , 1968 .
The H.R. 2516 legislation was passed by the 90th U.S. Congressional session and endorsed by the 36th President of the United States Lyndon Johnson on April 11 , 1968 .