the purchase, construction, and acquisition of plant and capital equipment as necessary and other expenses, $15,000,000, to remain available until expended, notwithstanding the limitations contained in section 306(g) of the Denali Commission Act of 1998: Provided , That funds shall be available for construction projects in an amount not to exceed 80 percent of total project cost for distressed communities, as defined by section 307 of the Denali Commission Act of 1998 (division C, title III, Public Law 105–277 ), as amended by section 701 of appendix D, title VII, Public Law 106–113 (113 Stat. 1501A–280), and an amount not to exceed 50 percent for non-distressed communities: Provided further , That notwithstanding any other provision of law regarding payment of a non-Federal share in connection with a grant-in-aid program, amounts under this heading shall be available for the payment of such a non-Federal share for programs undertaken to carry out the purposes of the Commission. Northern border regional commission For expenses necessary for the Northern Border Regional Commission in carrying out activities authorized by subtitle V of title 40, United States Code, $12,000,000, to remain available until expended: Provided , That such amounts shall be available for administrative expenses, notwithstanding section 15751(b) of title 40, United States Code. Southeast crescent regional commission For expenses necessary for the Southeast Crescent Regional Commission in carrying out activities authorized by subtitle V of title 40, United States Code, $250,000, to remain available until expended. Nuclear regulatory commission Salaries and expenses For expenses necessary for the Commission in carrying out the purposes of the Energy Reorganization Act of 1974 and the Atomic Energy Act of 1954, $953,050,000, including official representation expenses not to exceed $25,000, to remain available until expended, of which $47,700,000 shall be derived from the Nuclear Waste Fund: Provided , That of the amount appropriated herein,