Section 36A(4) in The Narcotic Drugs And Psychotropic Substances Act, 1985
(4)In respect of persons accused of an offence punishable under section 19 or section 24 or section 27A or for offences involving commercial quantity the references in sub-section (2) of section 167 of the Code of Criminal Procedure, 1973 (2 of 1974), thereof to "ninety days", where they occur, shall be construed as reference to "one hundred and eighty days":Provided that, if it is not possible to complete the investigation within the said period of one hundred and eighty days, the Special Court may extend the said period up to one year on the report of the Public Prosecutor indicating the progress of the investigation and the specific reasons for the detention of the accused beyond the said period of one hundred and eighty days.