The Chatham Highway Bridge, at mile 0.2, at Chatham, Massachusetts, shall operate as follows:
(a) From May 1 through October 31, the draw shall open on signal from 8 a.m. to 5 p.m., if at least one-hour notice is given and from 5 p.m. to 8 a.m. the draw shall open on signal if at least 12-hours notice is given by calling the Chatham Harbormasters Department.
(b) From November 1 through April 30, the draw shall open on signal if at least a 24-hours advance notice is given by calling the Chatham Harbormasters Department. [CGD01-05-006, 70 FR 32235, June 2, 2005]