The Sheldon Museum will rewrite policy to formalize procedures when acquiring pieces from members of its board of trustees.

Questions about the ethics of such purchases were raised recently when board chair Jim Shook offered to sell the museum a miniature totem pole carved by Leo Jacobs and a drum made by Nathan Jackson.

Shook, who said the two pieces are worth $7,000, this week withdrew his sale offer. “It can’t be the museum that…