Specifications include, but are not limited to: A. Contractor shall open and close the Bridge as required during normal working hours. B. Contractor shall make additional openings and closings of Bridge, as needed in order to test and adjust equipment. C. All openings and closings shall be performed in strict accordance with applicable rules and regulations contained in the Code of Federal Regulations, Title 33, Navigation and Navigable Waters, U.S. Coast Guard, Department of Transportation, as amended from time to time; particularly Section 117.15 Signals, as currently in force. D. Contractor shall make frequent inspections of the bridge and operating machinery, reporting the need for any repairs to the Engineer.