; and (B) which owns, leases, or operates, or will own, lease, or operate, the project in whole or in part, and at least one of the participants in the entity is a nongovernmental entity. (31) Revolving fund The term revolving fund (also called component entity ) means a fund or program established by a State or a political subdivision or other instrumentality of a State, the principal activity of which is to make loans, commitments, or other financial accommodation available for the development of one or more categories of infrastructure projects. (32) Secretary The term Secretary means the Secretary of the Treasury. (33) Smart grid The term smart grid means a system that provides for any of the smart grid functions set forth in section 1306(d) of the Energy Independence and Security Act of 2007 ( 42 U.S.C. 17386(d) ). (34) State The term State means any of the several States, the District of Columbia, Puerto Rico, Guam, American Samoa, the Virgin Islands, the Commonwealth of Northern Mariana Islands, and any other territory of the United States. (35) Telecommunications infrastructure project The term telecommunications infrastructure project means any project involving infrastructure required to provide communications by wire, fiber optic cable, satellite, or radio, including broadband, or to enhance security for such infrastructure. (36) Transportation infrastructure project The term transportation infrastructure project means any project for the construction, deferred maintenance, or enhancement, including security enhancement, of highways, roads, bridges, transit and intermodal systems, inland waterways, commercial ports, airports, high-speed and passenger rail, and rail track systems. (37) Trust fund The term Trust Fund means a delineated account in the books of the Bank, set up to receive and disburse grant money to fully or partially subsidize project loans to entities operating in disadvantaged communities. Trust fund receipts shall include those left over from net operations of the Bank, Federal grant