(1) The Court executing a decree sent to it shall have the same powers in executing such decree as if it had been passed by itself. All persons disobeying or obstructing the execution of the decree shall be punishable by such Court in the same manner as if it had passed the decree. And its order in executing such decree shall be subject to the same rules in respect of appeal as if the decree had been passed by itself.
(2) Without prejudice to the generality of the provisions of sub-section (1), the powers of the Court under that sub-section shall include the following powers of the Court which passed the decree, namely:—
(a) power to send the decree for execution to another Court under section 39;
(b) power to execute the decree against the legal representative of the deceased judgment-debtor under section 50;
(c) power to order attachment of a decree.
Legal Commentary & Landmark Judgments: Section 42
Section 42 defines the extensive powers of the court in executing a transferred decree, equipping the transferee court with the same powers in executing the decree as if it had been passed by itself.
You can apply directly to the transferee executing court under Section 42 to bring the judgment-debtor's legal heirs on record under Section 50 without needing to return to the original trial court.