; (2) to assist with workforce training or retraining to perform activities relating to the siting and operation of a production facility or a utilization facility at a brownfield site, including a retired fossil fuel site; and (3) to engage with the Nuclear Regulatory Commission, the Department of Energy, and other Federal agencies with expertise in civil nuclear energy. (c) Limitation on available amounts Of the cost of any project or activity eligible for a grant under this section— (1) except as provided in paragraphs (2) and (3), not more than 50 percent may be provided from amounts made available to carry out this section; (2) in the case of a project or activity 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 or activity 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. (d) Sources of assistance Subject to subsection (c), 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. (e) 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) Authorization of appropriations Section 14703 of title 40, United States Code, is amended— (A) by redesignating subsections (e) and (f) as subsections (f) and (g), respectively