Encumbering deaccessioned work a good idea?

Apparently this writer, Bob Beatty, thinks so.

“A museum selling a work should ensure that the institution or individual to which or whom the work is sold commit in some binding form to equal or higher conservational standards and equal or higher public access to the work in question”

In the U.S., this will have the same life-span as resale royalty rights. More via Hyperallergic.