Are you certain that your insurance was provided by Foremost? I filled out a quote form on line today, and called them to follow up on it when they opened their phone lines. The fellow I spoke with stated that they do not insure any boat larger than 27 feet or over 11 years in age. This means, in other words, that no Hatteras yacht ever built would be a candidate for insurance with Foremost. Is it possible you have them confused with another insurer? Many independent insurance agents handle more than one insurer.
In any case, my boat is definitely not a boat they would insure. I also asked them about regional differences in policies about who they insure, and he advised me that they are a national company and the same rules apply everywhere.