The most significant thing about this phrase – which was decided upon unanimously – is that no unconventional instrument is a priori excluded. But calibration and timing can occasionally be a source of discussion. But with the most recent decision the consensus decision-making is ultimately history now? Since 2010, we have had some decisions which were not taken unanimously.
Good central bank communication is also characterised by its emphasis on the state contingency of monetary policy decisions – in other words, it clarifies that the monetary policy 3/9  BIS central bankers' speeches  stance is contingent on the economic setting, and specifies how.