La. Stat. tit. 13 § 3479
The operation, navigation or maintenance by a non-resident or non-residents of a boat, ship, barge or other water craft in the state, either in person or through others, and the acceptance thereby by such non-resident or non-residents of the protection of the laws of the state for such water craft, or the operation, navigation or maintenance by a non-resident or non-residents of a boat, ship, barge or other water craft in the state, either in person or through others, other than under the laws of the state, shall be deemed equivalent to an appointment by each such non-resident of the Secretary of State, or his successor in office or some other person in his office during his absence he may designate, to be the true and lawful attorney of each such non-resident for service of process, upon whom may be served all lawful process in any suit, action or proceeding against such non-resident or non-residents growing out of any accident or collision in which such non-resident or non-residents may be involved while, either in person or through others, operating, navigating or maintaining a boat, ship, barge or other water craft in the state; and such acceptance or such operating, navigating or maintaining in the state of such water craft shall be a signification of each such non-resident's agreement that any such process against him which is so served shall be of the same legal force and effect as if served on him personally.
La. R.S. § 13:3479