; ; (5) by striking subsection (c)(3)(B) and inserting the following: (B) in the case of a vessel of at least 15,000 gross tons but less than 30,000 gross tons as measured under section 14502, or an alternate tonnage measured under section 14302 as prescribed by the Secretary under section 14104, if the vessel is 25 years old or older and has a single hull, or is 30 years old or older and has a double bottom or double sides; and ; (6) by striking subsection (c)(3)(C) and inserting the following: (C) in the case of a vessel of at least 30,000 gross tons as measured under section 14502, or an alternate tonnage measured under section 14302 as prescribed by the Secretary under section 14104, if the vessel is 23 years old or older and has a single hull, or is 28 years old or older and has a double bottom or double sides. ; and (7) in subsection (e)— (A) in paragraph (1), by striking and except as otherwise provided in paragraphs (2) and (3) of this subsection ; and (B) by striking paragraph (2) and redesignating paragraph (3) as paragraph (2). (b) Section 3705 of title 46, United States Code, is amended— (1) in subsection (b)— (A) by striking paragraph (2); (B) by striking (1) ; and (C) by redesignating subparagraphs (A) and (B) as paragraphs (1) and (2), respectively