barriers. Sec. 123. Multiyear procurement authority for Virginia class submarine program. Sec. 124. Procurement authority for Auxiliary Personnel Lighter program. Sec. 125. Limitation on reductions to V–22 aircraft nacelle improvement program. Sec. 126.  Limitation on consideration of Government-operated dry docks in certain contract solicitations. Sec. 127. Annual reports on use of Government docks for ship repair and maintenance. Subtitle D—Air Force Programs Sec. 131. Limitation on retirement of F–15 aircraft and modification of related reporting requirement. Sec. 132. Limitations and minimum inventory requirement relating to RQ–4 aircraft. Sec. 133. Temporary exception to minimum inventory requirement for fighter aircraft of the Air Force. Sec. 134. Modification of minimum inventory requirements for C–130 aircraft. Sec. 135. Modification of annual reports on T–7A Advanced Pilot Training System. Sec. 136. Modification to prohibition on certain reductions to B–1 bomber aircraft squadrons. Sec. 137. Modification of minimum inventory requirements for A–10 aircraft. Sec. 138. Procurement authority for over-the-horizon radar systems. Sec. 139. Prohibition on availability of funds for retirement of KC–135 aircraft. Sec. 140. Prohibition on reduction of KC–135 aircraft in PMAI of the reserve components. Sec. 141. Limitation on issuance of acquisition strategy for the KC–135 recapitalization program. Sec. 142. Prohibition on certain reductions to inventory of E–3 airborne warning and control system aircraft. Sec. 143. Prohibition on availability of funds for termination of production lines for the HH–60W aircraft. Sec. 144. Limitation on retirement of F–16C/D aircraft. Sec. 145. Limitation on procurement of KC–46A aircraft. Sec. 146. Limitation on actions relating to remote vision systems of KC–46A aircraft. Sec. 147.  Limitation on retirement of T–1A training aircraft. Sec. 148. Plan for long-term Air Force fighter force structure. Subtitle E—Defense-wide, Joint, and Multiservice Matters Sec. 151. Annual report on