This report recommends changes to clarify the law about the effect of the running of time on ownership of corporeal moveable property (ie physical things other than land and buildings). If someone possesses an object like a painting or an antique for many years, without actually having ownership, do they eventually become the owner? The present law is unclear. This makes Scotland contrast unfavourably with the position in most other countries. The Commission recommends two new rules which would convert possession to ownership. The first would apply where the person possessing the object reasonably believes that he or she is the owner, but turns out not to be - usually because the person from whom the object was bought was not the true owner. Provided that the possessor is in good faith (and does not, for instance, have reason to believe that the object was stolen), he or she would become owner after possessing the object for a continuous period of 20 years. The second rule applies to lent or deposited property where the owner can no longer be traced. Although the rule is general in application, it is particularly aimed to help museums and galleries. Under the new rule, the holder of the object would be able to claim ownership if the owner had not been in contact for 50 years and could not be traced using reasonable diligence. This certainty of ownership will assist museums and galleries in cataloguing and managing their collections.