  In de Sitter (dS) gravity, where gravity is a gauge field introduced to
realize the local dS invariance of the matter field, two kinds of conservation
laws are derived. The first kind is a differential equation for a dS-covariant
current, which unites the canonical energy-momentum (EM) and angular momentum
(AM) tensors. The second kind presents a dS-invariant current which is
conserved in the sense that its torsion-free divergence vanishes. The
dS-invariant current unites the total (matter plus gravity) EM and AM currents.
It is well known that the AM current contains an inherent part, called the spin
current. Here it is shown that the EM tensor also contains an inherent part,
which might be observed by its contribution to the deviation of the dust
particle's world line from a geodesic. All the results are compared to the
ordinary Lorentz gravity.
