or equipment (a) Prohibition on agency use or procurement The head of an agency may not procure or obtain, may not extend or renew a contract to procure or obtain, and may not enter into a contract (or extend or renew a contract) with an entity that uses any equipment, system, or service that uses covered telecommunications equipment or services as a substantial or essential component of any system, or as critical technology as part of any system. (b) Definitions In this section: (1) Agency The term agency has the meaning given that term in section 551 of title 5, United States Code. (2) Covered foreign country The term covered foreign country means the People’s Republic of China. (3) Covered telecommunications equipment or services The term covered telecommunications equipment or services means any of the following: (A) Telecommunications equipment produced by Huawei Technologies Company or ZTE Corporation (or any subsidiary or affiliate of such entities). (B) Telecommunications services provided by such entities or using such equipment. (C) Telecommunications equipment or services produced or provided by an entity that the head of the relevant agency reasonably believes to be an entity owned or controlled by, or otherwise connected to, the government of a covered foreign country.