Constitution of India , Art.311— Delhi Police (Punishment and Appeal) Rules (1980) , R.15(2)— Departmental enquiry - Validity - Enquiry against Subordinate Police Officer - Prior approval of Additional Commissioner has to be obtained - Enquiry initiated against Head-Constable for misconduct of manipulating F.I.R. - Without obtaining prior approval - Invalid - Consequent order of dismissal from service - Liable to be set aside - Considering @page-SCW1737gravity of misconduct back-wages refused on principle of 'No work no pay'. (Para 5 7)