I’m writing to let you know that now there is a Partial block model policy on Meta. If your local wiki does not have a policy to cover partial blocks then the model policy could be adapted for the wiki. Or if you have already written a customized policy for your wiki, you can share it on the Meta page for possible use by other wikis. There is also a page where you can share examples of the way that you are using partial block on your wiki.
You can also ask question or make comments to me here about using partial blocks. Regards, Sydney