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POL Government Elected Officials Auditor Griffin-Valade Charter, Code & Policies City Code & Charter Online Code & Charter Title 19 Chapter 19.16  Rules And Regulations
19.16.270 Lines Not To Cross Channel.

No person shall run any rope, cable, or any other obstruction across any channel or fairway within the harbor without first obtaining permission from the Harbor Master.  If so ordered by him/her, they shall maintain a proper patrol during such time to warn all approaching watercraft of such danger and also shall place red flags out by day and red lanterns by night, or other signals as ordered.