This law applies only to public buildings. It is intended to make some public buildings more practical.
1) Public kettles may only be dismantled by the donator (currently anyone can dismantle them)
2) Public glazier's benches may only be emptied/cleaned of melted glass by the donator (losing the glass that must be stored in the bench is very expensive)
3) Public casting boxes and forges may only be extinguished by the person that lit them (prevents project destruction by a third party)
(See also: Laws)