Although DIB is a 4
star post and
not a rank, it's given to the senior most IPS officer
insignia of CP/DGP is similar to Spl.CP /ADGP (not shown
of Police designation
can only be used by ADL.CP/DIG, JCP/IGP and CP/DGP, where the
latter is called Commissioner of Police (State)
and the former ones Commissioner of Police (City).