Whoever, having been convicted,—
(a)by a Court in 3[India], of an offence punishable under Chapter XII or Chapter XVII of this Code with imprisonment of either description for a term of three years or upwards, 4***
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shall be guilty of any offence punishable under either of those Chapters with like imprisonment for the like term, shall be subject for every such subsequent offence to 6[imprisonment for life], or to imprisonment of either description for a term which may extend to ten years.]