POL Government Elected Officials Auditor Mary Hull Caballero Charter, Code & Policies City Code & Charter Online Code & Charter Title 19 Chapter 19.16  Rules And Regulations
19.16.180 Watchmen on Ocean Going Vessels.

It is unlawful for the owner, agent or master of any ocean going vessel to allow the same to remain anchored or moored or made fast to or lie at any pier, unless there is adequate security provided, as approved by the Harbor Master.