authorizations and other authorizations TITLE XXXI—Department of Energy national security programs Subtitle A—National security programs and authorizations Sec. 3101. National Nuclear Security Administration. Sec. 3102. Defense environmental cleanup. Sec. 3103. Other defense activities. Sec. 3104. Nuclear energy. Subtitle B— Program authorizations, restrictions, and limitations Sec. 3111. Limitation on use of funds for naval nuclear fuel systems based on low-enriched uranium. Sec. 3112. Prohibition on ARIES expansion before realization of 30 pit per year base capability. Sec. 3113. Plutonium Modernization Program management. Sec. 3114. Pantex explosives manufacturing capability. Sec. 3115. Limitation on establishing an enduring bioassurance program within the National Nuclear Security Administration. Sec. 3116. Extension of authority on acceptance of contributions for acceleration or removal or security of fissile materials, radiological materials, and related equipment at vulnerable sites worldwide. Sec. 3117. Modification of reporting requirements for program on vulnerable sites. Sec. 3118. Implementation of enhanced mission delivery initiative. Sec. 3119. Limitation on use of funds until provision of spend plan for W80–4 ALT weapon development. Sec. 3120. Analyses of nuclear programs of foreign countries. Sec. 3121. Enhancing National Nuclear Security Administration supply chain reliability. Sec. 3122. Transfer of cybersecurity responsibilities to Administrator for Nuclear Security. Sec. 3123. Redesignating duties related to departmental radiological and nuclear incident responses. Sec. 3124. Modification of authority to establish certain contracting, program management, scientific, engineering, and technical positions. Sec. 3125. Technical amendments to the Atomic Energy Defense Act. Sec. 3126. Amendment to period for briefing requirements. Sec. 3127. Repeal of reporting requirements for Uranium Capabilities Replacement Project. Subtitle C—Budget and financial management matters Sec. 3131. Updated financial