I would say that most of the anchorages were not officially created. Under the common law right of navigation, basically, ships can anchor in safe places.
The anchorages, as I understand, have been established through common law practice and rights over many years, in some cases probably since the 1600s or 1700s—basically, since ships have been coming to the southern Gulf Islands. Some of those anchorages have been in use for a very prolonged period of time, in my understanding.