Section 2(5) in Chapter I defined "thika tenant" as follows: "(5) "thika tenant" means any person who holds, whether under a written lease or other wise, land under another person, and is or but for a special contract would be liable to pay rent, at a monthly or at any other periodical rate, for that land to that another person and has erected or acquired by purchase or gift any structure on such land for a residential, manufacturing or business purpose and includes the successors in interest of such person, but does not include a person (a) who holds such land under that another person in perpetuity; or 407 (b) who holds such land under that another person under a registered lease, in which the duration of the lease is expressly stated to be for a period of not less than twelve years; or (c) who holds such land under that another person and uses or occupies such land as a khattal." This new clause (5) was substituted by West Bengal Act 6 of 1953.