  We point to the possibility of existence of the statistical-spin-liquid state
as the state which differs from either Fermi or Luttinger liquid states. In the
statistical spin liquid the double occupancies are excluded from the physical
space. Each of the above three cases (Fermi, Luttinger and spin liquids)
represents an universality class for the interacting many-particle fermion
systems. The properties of the spin liquid such as the chemical potential, the
entropy, and the magnetization curve, as well as the quasiparticle structure
are briefly discussed.
