High Commission for India , Tanzania by substituting in ink the word 'permanently ' for the words 'for three years ' for securing customs clearance for his Mercedes Benz 200 Saloon Car , Model 1965 , bearing registration No , KGA 111 which he had brought along with him in July 1966 as part of his personal baggage , free of duty , under the international convention known as Carnet De Passage Tripe trique , under which 776 he could retain the car only for a maximum period of one year , which may prima facie make out a case for framing of a charge under s.420 read with s.511 of the Indian Penal Code , 1860 , we do feel that no useful purpose would be served by subjecting the appellant to another prosecution punishable under s.420 read with s.511 of the Code after a lapse of nearly 20 years.