Under La. Const. art. V § 5(D), the Louisiana Supreme Court has appellate jurisdiction when a law or ordinance has been declared unconstitutional. Let’s say that a plaintiff sues to have three statutes declared unconstitutional. The trial court renders a final judgment declaring two of the statutes unconstitutional but the third constitutional. The defendant appeals. Can the plaintiff answer the appeal and ask the Supreme Court to declare the third statute unconstitutional? The answer is “yes.” The case saying so is Louisiana High School Athletic Association v. State, 2012-1471 (La. 1/29/13), 107 So. 3d 583.
In case you ever need to research the Louisiana Constitution of 1921, here’s a link to an on-line copy, courtesy of the Cornell University Library. If you follow the link and scroll down, you’ll see download options, including PDF.
p.s. For the Louisiana Constitution of 1879, follow this link.