A sub-division is an administrative division of a district in India. In some states(Andhra Pradesh, Telangana, Tamil Nadu, Kerala) they are called Revenue Divisions.[1] It is headed by a sub-divisional magistrate (also known as assistant collector or assistant commissioner). In some states, the post is designated as Revenue Divisional Officer (RDO) or Sub-Divisional Officer (Civil).[2][3] A district may have multiple sub-divisions, and each of those sub-divisions may contain multiple sub-districts (tehsils/C.D. Blocks) and municipalities.[4] For example, in West Bengal, the Murshidabad district contains five sub-divisions (mahakumas)