Regulation O defines executive officers and insiders as follows:
"(e)(1) Executive officer of a company or bank means a person who participates or has authority to participate (other than in the capacity of a director) in major policymaking functions of the company or bank, whether or not the officer has an official title, the title designates the officer an assistant, or the officer is serving without salary or other compensation. 1 The chairman of the board, the president, every vice president, the cashier, the secretary, and the treasurer of a company or bank are considered executive officers, unless the officer is excluded, by resolution of the board of directors or by the bylaws of the bank or company, from participation (other than in the capacity of a director) in major policymaking functions of the bank or company, and the officer does not actually participate therein.
...(h) Insider means an executive officer, director, or principal shareholder, and includes any related interest of such a person."
Directors are insiders, and therefore covered by Regulation O - but unless they are an employee of the bank (or act in that capacity), they wouldn't also be an executive officer.
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Opinions my own.