I don't plan on doing something like this and I am mostly wondering if this is an actual enforced rule or more of a guideline... but honestly, I wouldn't see it as RP friendly....
IRPLY inheritance makes sense: A family continuing to use a commissioned build, as you described. I don't think someone should be able to go back and steal random builds... inspired is different ofc. However, say the House of Oak has a tower in one map, and generations later, the descendants of House of Oak (regardless if the builder is still involved with them) incorporate that original tower into a new build - would that be disallowed?
In an IRP perspective, I feel like that old build would just be architectural tradition or smth, not really OOC stealing.
And I won't lie, I'm unsure how far build "ownership" extends in MC or LotC. I don't know about the server's TOS or legal copyright that might apply... but I don't imagine MCRP builds are covered much....
Thoughts friend?