(a) The master of each U.S. tank vessel under Sec. 157.10a(b), Sec. 157.10a(c)(2), Sec. 157.10b(a)(2), or Sec. 157.10c(c)(2) shall ensure that the valves under Sec. 157.222(d) remain closed during each voyage.
(b) The master of each foreign tank vessel meeting Sec. 157.10a(b), Sec. 157.10a(c)(2), Sec. 157.10b(a)(2), or Sec. 157.10c(c)(2) shall ensure that the valves under Sec. 157.222(d) remain closed when the vessel is on a voyage in the navigable waters of the United States. [CGD 82-28, 50 FR 11629, Mar. 22, 1985]