TITLE XXIX—Overseas contingency operations military construction Sec. 2901. Authorized Army construction and land acquisition projects. Sec. 2902. Authorized Navy construction and land acquisition projects. Sec. 2903. Authorized Air Force construction and land acquisition projects. Sec. 2904. Authorized Defense Agencies construction and land acquisition projects. Sec. 2905. Authorization of appropriations. DIVISION C—DEPARTMENT OF ENERGY NATIONAL SECURITY 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. Clarification of roles and authorities of National Nuclear Security Administration. Sec. 3112. National Nuclear Security Administration Personnel System. Sec. 3113. Amendments to the Atomic Energy Act of 1954. Sec. 3114. Extension of enhanced procurement authority to manage supply chain risk. Sec. 3115. Pilot program on conduct by Department of Energy of background reviews for access by certain individuals to national security laboratories. Sec. 3116. Extension of authority for acceptance of contributions for acceleration of removal or security of fissile materials, radiological materials, and related equipment at vulnerable sites worldwide. Sec. 3117. Modification of limitation on development of low-yield nuclear weapons. Sec. 3118. Prohibition on use of funds for terminating activities at MOX facility. Subtitle C—Plans and Reports Sec. 3121. Modifications to cost-benefit analyses for competition of management and operating contracts. Sec. 3122. Review of defense environmental cleanup activities. Sec. 3123. Survey of workforce of national security laboratories and nuclear weapons production facilities. Sec. 3124. Elimination of certain reports. Sec. 3125. Implementation of