Pub. L. 115-282, tit. V, sec. 513
NUMBERING FOR UNDOCUMENTED BARGES.
SEC. 513. NUMBERING FOR UNDOCUMENTED BARGES. Section 12301(b) of title 46, United States Code, is amended—(1) by striking “shall” and inserting “may”; and(2) by inserting “of” after “barge”.