2E+WIn the case of a conviction involving sentence of death—
(a)the sentence shall not in any case be executed until after the expiration of the time within which notice of appeal or of application for leave to appeal under Part I of this Act may be given; and
(b)if notice is so given, the appeal or application shall be heard and determined with as much expedition as is practicable, and the sentence shall not be executed until after the determination of the appeal or, in cases where an application for leave to appeal is finally refused, of the application.