Section 117.55 - Posting of requirements(a) The owner of each drawbridge under this subpart, other than removable span bridges, must ensure that a sign summarizing the requirements in this subpart applicable to the drawbridge is posted both upstream and downstream of the drawbridge. The requirements to be posted need not include those in subpart A of this part or §§ 117.51 and 117.59 .(b) The signs shall be of sufficient size and so located as to be easily read at any time from an approaching vessel.(c) If advance notice is required to open the draw, the signs shall also state the name, address, and telephone number of the person to be notified.CGD 82-025, 49 FR 17452, Apr. 24, 1984, as amended by USCG-2001-10881, 71 FR 70309, Dec. 4, 2006; USCG-2016-0498, 82 FR 35081, July 28, 2017 USCG-2016-0498, 82 FR 35081, 7/28/2017