To the OP, the only problem I see coming from trying to restrict "random LS posts" to "LS updates" is that instead of other LS leaders getting annoyed at random LS banter bumping threads, they will get annoyed at the LS management staff posting random LS updates instead. IE the same end result except that they will be directing their annoyance at the LS leaders instead of just random LS members/interested parties. That may actually become a bigger problem and then more meetings will be redacted when LS leaders complain to other LS leaders that they are bumping their thread unfairly.
If this forum system is anything like PHPBB, maybe place all LS leaders into a separate "group" so that you can apply permissions to just that group to post in the LS section. But still, the above problem will likely come up anyway.
If this forum system is anything like PHPBB, maybe place all LS leaders into a separate "group" so that you can apply permissions to just that group to post in the LS section. But still, the above problem will likely come up anyway.