5.5.1 p. 60 says that "locked" means one needs permission from a "steward" to change something in Ancestral File (AF). Should each webtrees installation replace "submitter listed for the record or Family History Support when no submitter is listed" with "administrator of the database" and "Ancestral File" with the current tree?
If I change the marriage date to 1900, then the FAM is shown to visitors. However, the RESN doesn't stop the admin from editing it (which makes sense). I don't have anyone else who can edit at the moment. I don't want to take time to look at that until after I finish this LONG (due to completeness) test suite. Been at it for three days!
webtrees also extends the restriction to all members of the FAM even without a RESN on them. (I added a deceased son to verify) Spec neither requires nor forbids this even for AF.
For what it's worth, webtrees passes every test (so far—I'm about 85% done) except for a couple minor ones that are already in the bug reports.