CFR / 
Title 33
 / Part 117
 / 
Sec. 117.5 When the drawbridge must open.
Except as otherwise authorized or required by this part, drawbridges must
open promptly and fully for the passage of vessels when a request or signal to open is given in accordance with this subpart.
[USCG-2001-10881, 71 FR 70308, Dec. 4, 2006]