The backbone of every joint development agreement is the Transfer of Property Act 1882. Once the builder enters the land, its protection rests on Section 53A, the doctrine of part performance, which prevents the landowner from disturbing a transferee who has taken possession under a written contract and is willing to perform. The Registration and Other Related Laws (Amendment) Act 2001 narrowed that shield. For contracts executed on or after 24 September 2001, Section 17(1A) of the Registration Act 1908 requires registration, and the proviso to Section 49 denies an unregistered contract any effect under Section 53A. An unregistered joint development agreement protects nobody: not the builder's possession, and not the landowner's tax position. The builder's power of attorney draws its strength from Section 202 of the Indian Contract Act 1872 (irrevocable agency coupled with an interest), but after Suraj Lamp & Industries v. State of Haryana (2011) no power of attorney can replace a registered conveyance.
Under the Explanation to Section 2(zk) of the Real Estate (Regulation and Development) Act 2016 as published on India Code, where the person who builds and the person who sells are different, both are deemed promoters and are jointly liable. The project must be registered under Section 3 before marketing, 70 per cent of the amounts realised from allottees go into a separate account under Section 4(2)(l)(D), and Section 15 bars a transfer of the builder's majority rights without the consent of two-thirds of the allottees and the written approval of the Authority. In CIT v. Balbir Singh Maini (2017), the Supreme Court held that an unregistered JDA produced no taxable transfer. The Income-tax Act 2025 carries the former Section 45(5A) into Section 67(14), deferring an individual or HUF landowner's capital gains to the tax year of the completion certificate, while tax on any cash component is deducted under Section 393(1). Under the March 2019 real estate GST notifications, the builder pays tax on development rights under reverse charge, and GST on the landowner's flats falls due at the completion certificate or first occupation, whichever is earlier.