Non-cognizable offence: release on bail or personal bond confined to offences classified as non-cognizable under Central Excise law. Amendment confines the proviso to sub-section (2) of section 21 of the Central Excise Act so that the admission to bail or release on personal bond described in clause (a) and the proceedings referenced in clause (b) apply only where the offence is non-cognizable, thereby limiting the proviso's release mechanism to non-cognizable offences under the Central Excise law.