No financial assistance shall be provided to any firm under section
1914 of this title unless the owners, partners, or officers shall execute an agreement binding them and the firm for a period of 2 years after such financial assistance is provided, to refrain from employing, tendering any office or employment to, or retaining for professional services any person who, on the date such assistance or any part thereof was provided, or within one year prior thereto, shall have served as an officer, attorney, agent, or employee occupying a position or engaging in activities which the Secretary of Commerce shall have determined involve discretion with respect to the provision of such financial assistance.