However, a ministerial ruling on 9 July 1962 decreed that all future tactical nuclear weapons should be limited to a yield of 10 kt. The RAF issued a new version of the OR.1177 specification, accepting the lower yield, while making provision in the design for it to be capable of adaptation later for a higher yield, in the event of the political restriction being lifted. Meanwhile, the RAF explored ways of compensating for the lower yield by including, in the specifications for both the bomb and TSR-2, provision for releasing the smaller weapons in salvos, dropping sticks of four of the revised OR.1177, later named WE.177A, at intervals to prevent the detonation of the first weapon destroying the succeeding ones before they could, in turn, detonate. This led to the requirement that the TSR-2 must be able to carry four WE.177As, two internally and two on external underwing stores pylons—the width of the TSR-2 bomb bay (originally designed to accommodate a single Red Beard weapon) necessitating the reduction in diameter of the WE.177A to , the bomb's width and fin span being constrained by the need to fit two WE.177 bombs side-by-side in the aircraft's bomb bay.