In Andy's excellent Bozo's Guide the suggested operating frequency on 40 for JT65 is 7076. Here in this part of the world 7050 - 7100 is the main SSB operating area and 7075 is a very popular mobile SSB operating frequency. So we would, by Gentleman's agreement not operate JT65 on 7076 Main digital activity is in this area is 7035 to 7045, so if I operate JT65 on 7Mc it will be on 7045 USB, or any other frequency decided on by the group within that area.
Kevin VK5OA