33 C.F.R. § 117.31
(b) When a drawtender receives notice, or a proper signal as provided in § 117.15 of this part, the drawtender shall take all reasonable measures to have the draw opened, regardless of the operating schedule of the draw, for passage of the following, provided this opening does not conflict with local emergency management procedures which have been approved by the cognizant Coast Guard Captain of the Port:
[CGD 91-016, 58 FR 20, Jan. 4, 1993, as amended at 71 FR 70308, Dec. 4, 2006]