Dear Sandeep, In case the Land in question falls in the Agricultural Category, the minimum land which can be purchased / transferrred is 3.14 Acres , as per the U.P.Z.A. & LR Act. Any land which is less than this would be a "fragment" , and would vest in the State, and your interests would be seriously effected. The minimum area of 3.14 Acres is slightly more in the Areas of Bundelkhand etc. The Legislative intention behing this rule of minimum area of 3.14 acres (Maximum area in the name of single person is 12.5 acres) is the consolidation of land holdings, as , fragmentation of holdings may seriously effect the agriculture, and the State of UP, being primarily an agriculturist State cannot Simply let go the sale of agricultural lands in fragments.
Rule 143, as quoted by you is actually Section 143 of the U.P.Zamindari abolition ad Land Reforms Act, which authorises the Assistant Collector/SDM of the area to change the nature of a land from agricultural to residential. This change in the nature of the land is considered aither suo motu, or on the request of the party, whereupon, a survey of the land is conducted by the Lekhpal (A revenue official at the grassroot level) , and then he sends his report to the SDM concerned , with the endorsements of Tehsildar. If the SDM is satisfied from the report, he, in turns, passes a declaration under Section 143 , converting the landuse. This declaration, in turn, is sent by the SDM to the Sub Registrar of the area concerned , who registers it free of cost. The Process concludes with this.....should you require any further assistance, feel free to contact me.