Salaries and expenses For expenses necessary for the Delta Regional Authority and to carry out its activities, as authorized by the Delta Regional Authority Act of 2000, notwithstanding sections 382F(d), 382M, and 382N of said Act, $25,000,000, to remain available until expended. Denali commission For expenses necessary for the Denali Commission including 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, $20,000,000, 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: Provided further , That during fiscal year 2019, the duties and authority of the Federal Cochairperson shall be assumed by the Northern Border Regional Commission Program Director if the position of the Federal Cochairperson and Alternate Federal Cochairperson is vacant. Nuclear regulatory commission Salaries and