Sub division of plot after conveyence deed

Such sub-division  is a Revenue function. And, it is an inherent process once the mutation has been carried out.

Apply for the sub-division of the Survey Number to the Revenue authority concerned.

The permission from all co-owners is legally required for the subdivision of a property with a common survey number. This applies because until the land is formally partitioned, each co-owner has an undivided share in the entire property, not exclusive ownership of a specific portion.

In fact the owner has nothing to do with the sub-division process after having sold the property, it becomes rthe responsibility of the purchasers to get their property sub-divided as per procedures prescribed in yor state revenue department and registration department. 

Any attempt to sell or subdivide a demarcated portion of undivided land without the consent of all co-owners is generally considered invalid and unenforceable in court. 

If all co-owners agree on the division, they can execute a formal partition deed

The partition deed must be registered with the local Sub-Registrar's office to be legally binding. 

If the co-woners do not agree for partition, then you can file a suit for partition.

The court will then examine the ownership records and order the property's division