The board of trustees agreed to divest stock in Dun and Bradstreet, a corporation that refused to sign the Sullivan Principles, a code of conduct outlining suggested behavior for corporate activities in South Africa. The principles were developed by the Rev. Leon Sullivan, a board member of General Motors in 1977, to encourage U.S. corporations to put economic pressure on the South African government’s system of apartheid. The principles were ultimately adopted by 125 U.S. companies with operations in South Africa.