When it comes to marking a bounty notice as closed, would the expectation be to wait until all pending proposals that would satisfy the demand are resolved, rather than just closing it immediately on the first one being enacted?

Not specified, and in practice it’d probably depend on how close the proposals are to each other.

More important, I think, is that the bounty could be collectively awarded if successive proposals gradually satisfy the demand.

Okay. I’ll vote in favour since it leaves it up to the emperor to decide on a case by case basis, but in practice I’ll likely only consider groups of proposals that are within a couple of days or so at most. If a proposal builds on one from a week ago to satisfy a bounty, I’ll likely ignore the older one. 

Fair enough. If a Baron proposes a partial fulfillment of a very complex bounty like siege warfare and gets his follow-up proposal preempted due to lack of slots, that’s one thing. If this results in only the preempter getting the bounty, the bounty discourages incremental progress.

If the Baron proposes a partial fulfillment and leaves it hanging for a week, that’s another.