; and (2) to support digital literacy programs in areas in which a qualifying project that receives funding under section 3 is located. 5. Federal share (a) In general The Federal share of the cost of a project, campaign, or program that receives funding under this Act shall be not more than 50 percent. (b) Non-Federal share A State may use amounts received from the Secretary of Housing and Urban Development under the community development block grant program under title I of the Housing and Community Development Act of 1974 ( 42 U.S.C. 5301 et seq.), amounts received from the Appalachian Regional Commission established under section 14301(a) of title 40, United States Code, or amounts received from the Northern Border Regional Commission established under section 15301(a)(3) of title 40, United States Code, for the non-Federal share of the cost of a project, campaign, or program that receives funding under this Act. 6. Transparency and accountability (a) Last-Mile broadband infrastructure grants For grants awarded under section 3, the Commission shall establish transparency and accountability rules under which— (1) after receiving an application for a grant to carry out a qualifying project in an area, the Commission shall determine whether the area is served or unserved using accurate and granular information regarding the availability of broadband internet access service at the sub-census block level; (2) the Commission shall— (A) permit a person or entity to challenge an initial determination of the Commission under paragraph (1); and (B) provide a period of not less than 45 days, after the Commission makes an initial determination under paragraph (1) with respect to an area, during which a provider of broadband internet access service may voluntarily submit information concerning the broadband internet access service that the provider offers in the area; (3) the Commission shall provide the public with notice of— (A) an initial determination with respect to an area under paragraph (1)