  The dynamical evolution of the Hajicek $1$-form is derived in Einstein-Cartan
(EC) theory. We find that like Einstein theory of gravity, the evolution
equation is related to a projected part of the Einstein tensor $(\hat{G}_{ab})$
on a generic null surface $\mathcal{H}$, particularly $\hat{G}_{ab}l^a
q^b_{~c}$, where $l^a$ and $q^a_{~c}$ are the outgoing null generators of
$\mathcal{H}$ and the induced metric to a transverse spatial cross-section of
$\mathcal{H}$ respectively. Under the {\it geodesic constraint} a possible
fluid interpretation of this evolution equation is then proposed. We find that
it has the structure which is reminiscent to the {\it Cosserat generalization}
of the Navier-Stokes fluid provided we express the dynamical evolution equation
of the Hajicek $1$-form in a set of coordinates adapted to $\mathcal{H}$ and in
a local inertial frame. An analogous viewpoint can also be built under the
motive that the usual material derivative for fluids should be replaced by the
Lie derivative. Finally, the tidal force equation in EC theory on the null
surface is also derived.
