The S181 bridge, mile 0.4, at Annapolis, Maryland:

1. (a) From May 1 to October 31, Monday through Friday, except Federal and State holidays:

   1. (1) The draw shall remain closed from 7:30 a.m. to 9:00 a.m. and from 4:30 p.m. to 7:30 p.m., except the draw shall open at 6:00 p.m. and 7:00 p.m. for any vessels waiting to pass.
   2. (2) The draw shall open on the hour and the half-hour, from 9:00 a.m. to 4:30 p.m.
   3. (3) The draw shall open on the hour and half hour, from 7:30 p.m. to 7:30 a.m.

2. (b) From November 1 to April 30, Monday through Friday, except Federal and State holidays:

   1. (1) The draw shall remain closed from 7:30 a.m. to 9:00 a.m. and from 4:30 p.m. to 6:00 p.m.
   2. (2) The draw shall open on signal from 9:00 a.m. to 4:30 p.m. and from 6:00 p.m. to 7:30 a.m.
3. (c) On Saturdays, Sundays, and holidays year-round, the draw shall open on the hour and half-hour for vessels waiting to pass. Except on July 4th of every year from 8:30 p.m. to 11 p.m., the draw need not open for vessels, and in the event of inclement weather, the alternate date is July 5th.
4. (d) The drawspan must always open on signal for public vessels of the United States.

[CGD5-90-002, 55 FR 4604, Feb. 9, 1990, as amended by CGD05-94-08, 59 FR 44316, Aug. 29, 1994; CGD05-04-052, 69 FR 63066, Oct. 29, 2004; USCG-2001-10881, 71 FR 70311, Dec. 4, 2006; USCG-2012-0306, 77 FR 37314, June 21, 2012]