33 CFR 117.7: General requirements of drawbridge owners.

Except for drawbridges that have been authorized, before January 3, 2007, to remain closed to navigation or as otherwise specified in subpart B, drawbridge owners must:

(a) Provide the necessary drawtender(s) for the safe and prompt opening of the drawbridge.

(b) Maintain the working machinery of the drawbridge in good operating condition.

(c) Cycle the drawspan(s) periodically to ensure operation of the drawbridge.

(d) Ensure that the drawbridge operates in accordance with the requirements of this part.

(e) Any drawbridge allowed to remain closed to navigation prior to January 3, 2007, when necessary, must be returned to operable condition within the designated time set forth by the District Commander and will become subject to the requirements of this part.