Non-cognizable classification of Central Excise offences limits cognizability to serious imprisonable offences, changing arrest and FIR rules. All offences under the Central Excise Act are classified as non-cognizable, except for the specified serious imprisonable offence which remains cognizable; this substitution of subsection (1) of section 9A operates notwithstanding the Code of Criminal Procedure and takes effect from the date of the Bill's presidential assent.