1. Short title This Act may be cited as the Better Utilizing Investments to Leverage Development for Underfunded Projects Act or the BUILD UP Act . 2. Set-aside for BUILD grant amounts (a) In general With respect to grant amounts provided under the heading Office of the Secretary—National Infrastructure Investments in title I of division H of the Further Consolidated Appropriations Act, 2020 ( Public Law 116–94 ) for eligible projects, the Secretary of Transportation shall ensure that not less than 30 percent of the amount provided under such heading shall be provided to cities with populations of between 10,000 and 75,000, whether or not 1 or more of such cities are considered part of an urbanized area as designated by the United States Census Bureau. (b) Eligible project defined In this section, the term eligible project means a project eligible for funding under title I of division H of the Further Consolidated Appropriations Act, 2020 ( Public Law 116–94 ), including— (1) a highway or bridge project eligible under title 23, United States Code; (2) a public transportation project eligible under chapter 53 of title 49, United States Code; (3) a passenger and freight rail transportation project eligible under title 23 or title 49, United States Code; (4) a port infrastructure investment (including inland port infrastructure and land ports of entry) eligible under title 23, United States Code, chapter 503 of title 46, United States Code, or title 49, United States Code; and (5) a project investing in a surface transportation facility that is located on tribal land and for which title or maintenance responsibility is vested in the Federal Government under title 23, United States Code.