8 A helpful summary of the relevant procedural and substantive principles is found in Fry on Specific Performance (6th ed, 1921) at 546 - 547. That summary supports use of the notice of motion procedure in circumstances where relief is sought following a judgment for specific performance and the contract has not been completed:
1170 . It may and not unfrequently does happen that after judgment has been given for the specific performance of a contract, some further relief becomes necessary, in consequence of one or other of the parties making default in the performance of something which ought under the judgment to be performed by him or on his part; as, for instance, where a vendor refuses or is unable to execute a proper conveyance of the property, or a purchaser to pay the purchase-money. The character of the consequential relief appropriate to any particular case will of course vary according to the nature of the subject-matter of the contract and the position which the applicant occupies in the transaction; but in every case the application must, under the present practice, be made only to the Court by which the judgment was pronounced, and the multiplicity of legal proceedings which sometimes occurred before the fusion of the jurisdictions of the Courts of Chancery and Common Law is now practically impossible.
1171. There are two kinds of relief after judgment for specific performance of which either party to the contract may, in a proper case, avail himself.
1172. (i.) He may obtain ( on motion in the action ) an order appointing a definite time and place for the completion of the contract by payment of the unpaid purchase-money and delivery over of the executed conveyance and title-deeds, or a period within which the judgment is to be obeyed, and, if the other party fails to obey the order, may thereupon at once issue a writ of sequestration against the defaulting party's estate and effects…
1173. (ii.) He may apply to the Court ( by motion in the action ) for an order rescinding the contract. On an application of this kind, if it appears that the party moved against has positively refused to complete the contract, its immediate rescission may be ordered: otherwise, the order will be for rescission in default of completion within a limited time. (emphasis added)