(a) Mooring lines shall only be cast off as directed by the officer in charge of a mooring operation.
(b) No vessel shall proceed out of a lock until the exit gates, ship arresters and the bridge, if any, are in a fully open position.
(c) No vessel shall use thrusters when passing a lock gate. (68 Stat. 93-96, 33 U.S.C. 981-990, as amended and secs. 4, 5, 6, 7, 8, 12 and 13 of sec. 2 of Pub. L. 95-474, 92 Stat. 1471) [39 FR 10900, Mar. 22, 1974, as amended at 48 FR 20691, May 9, 1983]