The draw of the SR70 bridge, mile 23.8 near Belle River, shall open on signal; except that, from 10 p.m. to 6 a.m., the draw shall open on signal if at least four hours notice is given, and from June 1 through August 31 the draw shall open on signal on the hour from 6 a.m. to 10 p.m. The bridge shall open anytime at the direction of the District Commander.
33 C.F.R. §117.424