No employee shall have a pecuniary interest, directly or indirectly, in any business wherein the department or an institution is a party in interest; nor shall he receive, directly or indirectly, any fee, commission, gratuity or present from any person or corporation furnishing supplies to or doing business for or with the institution or the department.
N.Y. Comp. Codes R. & Regs. Tit. 7 § 52.4