The draw of the Bruckner Boulevard/Unionport Bridge, mile 1.7, at the Bronx, New York, shall open on signal if at least a two-hour advance notice is given to the New York City Department of Transportation (NYCDOT) radio hotline, or the NYCDOT Bridge Operations Office. The draw need not be opened for vessel traffic from 7 a.m. to 9 a.m. and 4 p.m. to 6 p.m., Monday through Friday. The owner of the bridge shall provide clearance gauges according to the provisions of § 118.160 of this chapter.