Based on the provided legal document, here are the key points:

• The requirement of a notification under Section 4 of the Land Acquisition Act, 1894, is mandatory and cannot be dispensed with; without it, acquisition proceedings under Section 6 are contrary to law and liable to be quashed (!) (!) .
• The acquisition of land for the "Planned Development of Delhi" constitutes a valid "public purpose" under Section 3(f) of the Act, as it addresses the vital necessity of civic life, housing deficits, and orderly urban growth (!) (!) .
• The Government's declaration regarding the public purpose is final and conclusive, unless it amounts to a colourable exercise of power or is unrelated to the objects specified in the Act (!) (!) .
• The land in dispute measuring 76 Bighas 01 Biswa was still classified as "evacuee land" on the date of the notification (November 13, 1959) because the title had not passed to the allottees prior to that date (!) (!) .
• Under the Displaced Persons (Compensation and Rehabilitation) Rules, 1955, an allottee obtains permanent property rights and title only upon the issuance of a "sanad"; possession alone does not transfer title (!) (!) .
• Since the notification under Section 4 specifically excluded evacuee land and the title had not passed before the notification date, no valid notification under Section 4 was issued for the 76 Bighas 01 Biswa plot (!) (!) .
• Consequently, the notification under Section 6 issued later for the same plot is invalid as it lacks the mandatory condition precedent of a Section 4 notification (!) (!) .
• The court quashed the acquisition proceedings, notifications, and awards specifically regarding the 76 Bighas 01 Biswa plot but dismissed the petitioner's petition regarding the remaining land in dispute where no illegality was found (!) (!) .