Reword the rule Treasure Islands that currently reads

Listed below are possible Treasure Islands that a Captain or treasure may be located:

to say

If the a treasure map proposal mentions a location that does not exist on the list of islands below in this rule, is shall be listed when the treasure map proposal is passed. An island listed this way will have no special attributes or effects unless the proposal causes it. Listed below are possible Treasure Islands that a Captain or treasure may be located:

and in case

List any islands mentioned in treasure maps in the Treasure Islands rule.