 The current system, being phased out in favor of Mercosul standard plates, was created in 1990 and was named "Registro Nacional de Veículos Automotores" (RENAVAM).It uses the form "LLL·NNNN", where LLL is a three-letter combination followed by a four-digit number with a dot between the letters and numbers.A combination given to one vehicle stays with it "for life" - it cannot be changed or transferred to another vehicle.