Duval ruled in favor of Planned Parenthood of America, which took the view that the choice of displaying the plates violated the First Amendment to the United States Constitution because there was no alternative display available for supporters of abortion.
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Judge Duval issued rulings in 2005 and 2006 in reference to the constitutional rights of victims of Hurricane Katrina.
Duval County, Florida | Duval County | Damon Duval | Claude Duval | Solomon Stanwood Menken | Jean-Jacques Duval d'Eprémesnil | Duval County Public Schools | Duval | Stanwood Duval | Sign for the Viking Restaurant (and Fjord Room), Viking Village shopping center, reflects Stanwood's Scandinavia | Portia Duval-Rigby | Lil Duval | Jeanne Duval | James Duval | Isaac H. Duval | Gaël Duval | François Duval | Duval County, Texas | Daniel Duval | Claude Duval (opera) | Claude B. Duval | Brigitte Jobbé-Duval | Bob Duval | Biju-Duval d'Algreis |
Duval also had two nephews, his namesake Claude Berwick Duval, II (born 1955), a prominent Houma attorney, and U.S. District Judge Stanwood Richardson Duval, Jr. (born 1942), an appointee of President William Jefferson Blythe "Bill" Clinton, based in New Orleans.