Q : Would a permanent resident be required to surrender his/her original ”green card” upon receipt of the new one?

No.  As previously stated, applicants must carry evidence that they have a legal right to live and work in the United States.  The “green card” offers that evidence.  Since applicants normally receive permanent resident cards in a matter of weeks after their appointments, they would need to retain their older cards until the new one is received.  Under the proposed rule, USCIS would announce in the Federal Register the date when all of the cards without an expiration date would be terminated.