; (B) for the 180-day period following the briefing— (i) planned objectives for the programs; and (ii) anticipated spending plans for the programs; (C) a description of any notable technical hurdles that could impede timely completion of the programs; and (D) any other information the Under Secretary of Defense for Acquisition and Sustainment considers appropriate. (3) Period specified The period specified in this paragraph is— (A) in the case of the first briefing required by paragraph (1), the 180-day period preceding the briefing; and (B) in the case of any subsequent such briefing, the period since the previous such briefing. (4) Termination The requirement to provide briefings under paragraph (1) shall terminate on the date that the program described in subsection (a) achieve initial operational capability, as defined jointly by the Secretary of the Navy and the Commander of United States Strategic Command. (e) Phase 6.X process defined In this section, the term phase 6.X process means the phase 6.X process for major stockpile sustainment activities set forth in the memorandum of the Nuclear Weapons Council entitled Procedural Guidelines for the Phase 6.X Process and dated April 19, 2000. 1619. Operational timeline for Strategic Automated Command and Control System (a) In general The Secretary of the Air Force shall develop a replacement of the Strategic Automated Command and Control System (SACCS) by not later than the date that the LGM–35A Sentinel intercontinental ballistic missile program reaches initial operational capability. (b) Replacement capabilities The replacement required by subsection (a) shall— (1) replace the SACCS base processors; (2) replace the SACCS processors at launch control centers; (3) provide internet protocol connectivity for wing-wide command centers of the LGM–35A Sentinel intercontinental ballistic missile program