The advisories concerned Iran, but experts said the ruling seemed to extend to Cuba, Libya, North Korea and other nations with which most trade is banned without a government license.
His father is a partner in Douglas C. Lane & Associates, an investment advisory concern in New York.
David B. Blanchard, the chairman of the Clifford Management Group, a financial advisory concern that he founded, and president of Clifford Asset Management, another investment advisory concern, died on Monday at the Memorial Sloan-Kettering Cancer Center in Manhattan.
The advisory concern also recommended that shareholders ratify the nomination of Édouard Stern as a board director.
The advisory concern, Institutional Shareholder Services, said in a report dated April 15 that Rhodia's apparent failure to explore options for itself was a concern.
He is the executive director, based in New York, of Dynasty Capital Services of Moraga, Calif., a financial advisory concern that seeks to develop new businesses, especially in Asia.
An influential shareholder advisory concern in the United States recommended that stockholders vote for the removal of the chief executive of Rhodia, a French specialty chemicals company, at its annual meeting this month.
But perhaps more critical is his relationship with his real estate partner, John Ceriale, who runs the hotel division of the Blackstone Real Estate Group, an arm of the Blackstone global private equity and advisory concern.
Mr. Schwarzman, who is the president and chief executive of the Blackstone Group, a global investment and advisory concern in New York, is on the board of the New York City Ballet, the Film Society of Lincoln Center and the New York Public Library, in addition to his work in Washington.
Also Monday, Freddie Mac said it was canceling its contracts with eight outside investment advisory concerns.
