Mass. Gen. Laws ch. 200B, § 3
(a) Unless a written loan agreement provides otherwise, a museum may apply conservation measures to, or dispose of, undocumented property or property on loan to the museum without the lender's or claimant's permission or notice to the lender or claimant if:
(b) Unless a written loan agreement provides otherwise, a museum that applies conservation measures to or disposes of loaned property in accordance with subsection (a) shall: