112 STAT. 2246 PUBLIC LAW 105-261—OCT. 17, 1998 have been authorized and appropriated before the date of the enactment of this Act. (2) The term "defense environmental management funds" means funds appropriated to the Department of Energy pursuant to an authorization for carrying out environmental restoration and waste management activities necessary for national security programs. (f) DURATION OF AUTHORITY. — The managers of the field offices of the Department may exercise the authority provided under subsection (a) during the period beginning on October 1, 1998, and ending on September 30, 1999. Subtitle C—Program Authorizations, Restrictions, and Limitations 42 USC 7273c. SEC. 3131. PERMANENT EXTENSION OF FUNDING PROHIBITION RELAT- ING TO INTERNATIONAL COOPERATIVE STOCKPILE STEWARDSHIP. Section 3133(a) of the National Defense Authorization Act for Fiscal Year 1998 (Public Law 105-85; 111 Stat. 2036) is amended by striking out "for fiscal year 1998" and inserting in lieu thereof "for any fiscal year". SEC. 3132. SUPPORT OF BALLISTIC MISSILE DEFENSE ACTIVITIES OF THE DEPARTMENT OF DEFENSE. (a) FUNDS To CARRY OUT CERTAIN BALLISTIC MISSILE DEFENSE ACTIVITIES.—Of the amounts authorized to be appropriated to the Department of Energy pursuant to section 3101, $30,000,000 shall be available for research, development, and demonstration activities to support the mission of the Ballistic Missile Defense Organization of the Department of Defense, including the following activities: (1) Technology development, concept demonstration, and integrated testing to improve reliability and reduce risk in hit-to-kill interceptors for missile defense. (2) Support for science and engineering teams to address technical problems identified by the Director of the Ballistic Missile Defense Organization as critical to acquisition of a theater missile defense capability. (b) MEMORANDUM OF UNDERSTANDING. —The activities referred to in subsection (a) shall be carried out under the memorandum of understanding entered into by the Secretary of Energy and the Secretary of Defense for the use of national laboratories for ballistic missile defense programs, as required by section 3131 of the National Defense Authorization Act for Fiscal Year 1998 (Public Law 105-85; 111 Stat. 2034). (c) METHOD OF FUNDING.— Funds for activities referred to in subsection (a) may be provided— (1) by direct payment from funds available pursuant to subsection (a); or (2) in the case of such an activity carried out by a national laboratory but paid for by the Ballistic Missile Defense Organization, through a method under which the Secretary of Energy waives any requirement for the Department of Defense to pay any indirect expenses (including overhead and federal administrative charges) of the Department of Energy or its contractors.