§ 1241s. Restrictions on operations of American Great Lakes vessels
(a) In general
Subject to subsection (b) of this section, an American Great Lakes vessel shall not be used—
(1) to engage in trade—
(2) to carry bulk cargo (as that term is defined in section 1702 of this Appendix  which is subject to section 1241 (b) or 1241f of this Appendix, or section 2631 of title 10; or
(b) Off-season carriage exception
(1) In general
Subject to paragraph (2), an American Great Lakes vessel may be used to engage in trade otherwise prohibited by subsection (a)(1)(A) of this section for not more than 90 days during any 12-month period.
 So in original. Probably should be followed by a closing parenthesis.