; (2) in the case of a project to be carried out in a county for which a distressed county designation is in effect under section 14526, not more than 80 percent may be provided from amounts made available to carry out this section; and (3) in the case of a project to be carried out in a county for which an at-risk county designation is in effect under section 14526, not more than 70 percent may be provided from amounts made available to carry out this section. (c) Sources of assistance Subject to subsection (b), a grant provided under this section may be provided from amounts made available to carry out this section, in combination with amounts made available— (1) under any other Federal program; or (2) from any other source. (d) Federal share Notwithstanding any provision of law limiting the Federal share under any other Federal program, amounts made available to carry out this section may be used to increase that Federal share, as the Appalachian Regional Commission determines to be appropriate. . (2) Clerical amendment The analysis for subchapter I of chapter 145 of title 40, United States Code, is amended by inserting after the item relating to section 14510 the following: 14511. Appalachian regional energy hub initiative. . (b) Authorizations Section 14703 of title 40, United States Code, is amended— (1) by redesignating subsections (d) and (e) as subsections (e) and (f), respectively; and (2) by inserting after subsection (c) the following: (d) Appalachian regional energy hub initiative Of the amounts made available under subsection (a), $5,000,000 shall be used to carry out section 14511 for each fiscal year. .