H.Amdt.672 - Amendment repeals "Don't Ask Don't Tell" only after: (1) receipt of the recommendations of the Pentagon's Comprehensive Review Working Group on how to implement a repeal of DADT (due December 1, 2010) and (2) a certification by the Secretary of Defense, Chairman of the Joint Chiefs and President that repeal is first, consistent with military readiness, military effectiveness, unit cohesion & recruiting, and second, that the DoD has prepared the necessary policies and regulations to implement its repeal. The amendment also includes a 60 day period after certification before the repeal takes effect.