; and (C) the machine-readable visa fee established under section 103 of the Enhanced Border Security and Visa Entry Reform Act of 2002 ( 8 U.S.C. 1713 ). (c) Investment of amounts (1) In general The Secretary of the Treasury shall invest such portion of the Trust Fund as is not required to meet current obligations in interest-bearing obligations of the United States or in obligations guaranteed as to both principal and interest by the United States. (2) Interest and proceeds The interest on, and the proceeds from the sale or redemption of, any obligations held in the Trust Fund shall be credited to the Trust Fund as discretionary offsetting collections, and shall form a part of the Trust Fund. (d) Use of Trust Fund (1) In general Amounts in the Trust Fund, including amounts described in subsection (c)(2), shall be made available to the Secretary for the purposes described in paragraph (2) only to the extent and in the amounts provided in advance in appropriations Acts. (2) Purposes Subject to paragraph (1), amounts in the Trust Fund shall be made available for the following purposes: (A) The construction of new United States ports of entry. (B) The expansion and improvement of existing United States ports of entry infrastructure to accommodate high volumes of commercial, vehicle, and pedestrian traffic. (C) The procurement of technology and supporting infrastructure for United States ports of entry, and related cargo and commercial inspection facilities, to facilitate the inspection and processing of commercial, vehicle, and pedestrian traffic. (D) The facilitation of major repairs and alterations of United States land ports of entry. (E) Hiring U.S. Customs and Border Protection officers, agricultural specialists, and professional staff to support the trade and revenue mission of such agency. (3) Consultation (A) In general The purposes described in paragraph (2) shall be carried out by the Secretary, in consultation with the Administrator of General Services, the Chief of Engineers and Commanding General of