Advocates appeared:
For the Appellant(s) : Mr. Jayanth Muth Raj, Sr. Adv. Mrs. Malavika Jayanth, AOR Ms. Isha Singh, Adv.
For the Respondent(s): Mr. R.Ganesh, Adv. Mr. G. Balaji, AOR Ms. Arzu Paul, Adv. Mr. Neeleshwar Pavani, Adv. Mr. V.Puneedhan, Adv. Ms. D.Naveena, Adv.

Based on the provided legal document, the key points are as follows:

1. An agreement to sell and a deed assigning a decree for specific performance of an immovable property do not require registration, as the decree itself does not create or transfer any right, title, or interest in the property (!) (!) .

2. The passing of a decree for specific performance does not extinguish the underlying contract between the parties. The contract subsists and remains enforceable until the execution of a sale deed, which is the point at which rights and interests in the property are transferred (!) (!) (!) .

3. Registration is mandatory only for non-testamentary instruments that transfer or assign any decree, order, or award of a Court when such instrument purports to create, declare, assign, limit, or extinguish rights, titles, or interests in immovable property valued at one hundred rupees and above (!) (!) (!) .

4. Since a decree for specific performance does not itself create or transfer any interest in the immovable property, an assignment of such a decree does not require registration (!) (!) (!) .

5. The rights arising from a decree for specific performance are not interest in the property itself but are claims for enforcement of the contractual obligation. These rights can be assigned, but the assignment does not automatically transfer ownership or interest in the property until the sale deed is executed and registered (!) (!) (!) .

6. The legal process for executing a decree involves the actual transfer of ownership through the execution of a registered sale deed, which must be done either by the judgment debtor or through the court if the debtor fails to do so (!) (!) .

7. The decree for specific performance is an equitable relief that recognizes a claim for enforcement but does not by itself confer any ownership rights in the property. The decree-holder's right to the property is only perfected upon registration of the sale deed (!) (!) (!) .

8. An assignment deed that transfers rights arising out of a decree for specific performance, without creating or purporting to create any right, title, or interest in the property, does not require registration under the applicable laws (!) (!) .

9. The process of executing a decree can be carried out by an assignee of the decree, provided the assignment is in writing and complies with procedural requirements, such as giving notice to the original parties (!) (!) (!) .

10. Overall, the legal framework clarifies that a decree for specific performance does not itself transfer ownership or create interest in the property, and the assignment of such a decree does not necessitate registration unless the assignment itself creates or purports to create a right, interest, or charge in the property (!) (!) (!) .

These points collectively establish that the assignment of a decree for specific performance of an immovable property does not require registration, as it does not create or transfer any interest in the property itself.