(a) Mooring lines shall only be placed on mooring posts as directed by the officer in charge of a mooring operation.
(b) Once the mooring lines are on the mooring posts, lines shall be kept slack until the ``all clear'' signal is given by the lock personnel. When casting off signal is received, mooring lines should be kept slack until the ``all clear'' signal is given by the lock personnel. [39 FR 10900, Mar. 22, 1974, as amended at 77 FR 40804, July 11, 2012]