CA Civ Code Section 1899.4

(a)

It is the responsibility of the owner of property on loan to a museum to notify the museum promptly in writing of any change of address or change in ownership of the property. Failure to notify the museum of these changes may result in the owner’s loss of rights in the property.

(b)

The owner of property on loan to a museum may file with the museum a notice of intent to preserve an interest in the property as provided for in Section 1899.5. The filing of a notice of intent to preserve an interest in property on loan to a museum does not validate or make enforceable any claim which would be extinguished under the terms of a written loan agreement, or which would otherwise be invalid or unenforceable.