Having faced the costs of migration from the now defunct wmflabs instance to production, this needs careful consideration.

Precisely. The other site is still empty, not launched. At this point, I'd rather prefer that WMF-Legal launches their project here instead of in a separate site, generating content that perhaps one day must be migrated.

Currently Legalpad is uninstalled on this instance (phabricator.uninstalled-applications). That's easy to change.

I could enable it on phabricator.wikimedia.org but I feel like checking again if WMF-Legal is interested in that, seeing not much happening in the separate instance. (Situation might be due to communication misunderstandings on my side, though.)

So feedback from Legal / further parties is welcome here.

We need Legalpad also for T655: Implement the Volunteer NDA process in Phabricator (a task that I had committed to for November, but never mind).

WMF-Legal is not saying anything at the moment because I met with them in October and I promised them that we would install Legalpad in production after the Bugzilla migration. The trausted user tool is still a WMF Board mandate, and a top priority for them.

What Quim said :)

(Also testing if email reply-to works, despite the "no-reply@" from:
address)

I enabled it for now w/ the designated settings in the description (the legal group was wrong :)

https://phabricator.wikimedia.org/legalpad/

I'm not sure if "can use: public" is actually the right thing? but you asked for and you got it.