La. Code Civ. Proc. art. 686
Either spouse is the proper plaintiff, during the existence of the marital community, to sue to enforce a community right; however, if one spouse is the managing spouse with respect to the community right sought to be enforced, then that spouse is the proper plaintiff to bring an action to enforce the right.
When doubt exists whether the right sought to be enforced is a community right or is the separate right of the plaintiff spouse, that spouse may sue in the alternative to enforce the right.
When only one spouse sues to enforce a community right, the other spouse is a necessary party. Where the failure to join the other spouse may result in an injustice to that spouse, the trial court may order the joinder of that spouse on its own motion.
La. C.P. § 686