shall take such measures so as to ensure an equitable geographic distribution of funds, an appropriate balance in addressing the needs of urban and rural areas, including Tribal areas, and the investment in a variety of transportation modes: Provided further, That for amounts made available under this heading in this Act, the Secretary shall give priority to projects that require a contribution of Federal funds in order to complete an overall financing package: Provided further, That section 6702(f)(1) of title 49, United States Code, shall not apply to amounts made available under this heading in this Act: Provided further, That of the amounts awarded under this heading in this Act, not more than 50 percent shall be allocated for eligible projects located in rural areas and not more than 50 percent shall be allocated for eligible projects located in urbanized areas: Provided further, That for the purpose of determining if an award for planning, preparation, or design under this heading in this Act is an urban award, the project location is the location of the project being planned, prepared, or designed: Provided further, That the Secretary may retain up to 2 percent of the amounts made available under this heading in this Act, and may transfer portions of such amounts to the Administrators of the Federal Aviation Administration, the Federal Highway Administration, the Federal Transit Administration, the Federal Railroad Administration and the Maritime Administration to fund the award and oversight of grants and credit assistance made under the program authorized under section 6702 of title 49, United States Code: Provided further, That for amounts made available under this heading in this Act, the Secretary shall consider and award projects based solely on the selection criteria as identified under section 6702(d)(3) and (d)(4) of title 49, United States Code. NATIONAL SURFACE TRANSPORTATION AND INNOVATIVE FINANCE BUREAU For necessary expenses of the National Surface Transportation and Innovative Finance