  Previously published admissibility conditions for an element of
$\{0,1\}^{\mathbb{Z}}$ to be the itinerary of a point of the inverse limit of a
tent map are expressed in terms of forward orbits. We give necessary and
sufficient conditions in terms of backward orbits, which is more natural for
inverse limits. These backward admissibility conditions are not symmetric
versions of the forward ones: in particular, the maximum backward itinerary
which can be realised by a tent map mode locks on intervals of kneading
sequences.
