(March 17, 2016, 1:14 PM EDT) -- NEW ORLEANS — An expert may not testify regarding the regulations applicable to a vessel, the vessel’s unseaworthiness, the vessel owner’s alleged negligent conduct and the factual and proximate causes of a plaintiff’s alleged injury, a Louisiana federal judge ruled March 15 (Justin Shawler v. Ergon Asphalt & Emulsions, Inc. and Big Valley, LLC, No. 15-2599, E.D. La.; 2016 U.S. Dist. LEXIS 33210)....