is less, during the time period covered by this Act. (b) (1) The Nuclear Regulatory Commission may waive the notification requirement in subsection (a) if compliance with such requirement would pose a substantial risk to human health, the environment, welfare, or national security. (2) The Nuclear Regulatory Commission shall notify the Committees on Appropriations of both Houses of Congress of any waiver under paragraph (1) as soon as practicable, but not later than 3 days after the date of the activity to which a requirement or restriction would otherwise have applied. Such notice shall include an explanation of the substantial risk under paragraph (1) that permitted such waiver and shall provide a detailed report to the Committees of such waiver and changes to funding levels to programs, projects, or activities. (c) Except as provided in subsections (a), (b), and (d), the amounts made available by this title for Nuclear Regulatory Commission—Salaries and Expenses shall be expended as directed in the report of the Committee on Appropriations accompanying this Act. (d) None of the funds provided for the Nuclear Regulatory Commission shall be available for obligation or expenditure through a reprogramming of funds that increases funds or personnel for any program, project, or activity for which funds are denied or restricted by this Act. (e) The Commission shall provide a monthly report to the Committees on Appropriations of both Houses of Congress, which includes the following for each program, project, or activity, including any prior year appropriations— (1) total budget authority