45.—(1) Upon being advised by the court concerned of the commencement of a probate action the Senior Registrar shall give notice of the action to every caveator other than the plaintiff in the action in respect of each caveat that is in force.
(2) In respect of any caveat entered subsequent to the commencement of a probate action the Senior Registrar shall give notice to that caveator of the existence of the action.
(3) Unless a registrar of the Principal Registry by order made on summons otherwise directs, the commencement of a probate action shall operate to prevent the sealing of a grant (other than a grant under section 117 of the Act) until application for a grant is made by the person shown to be entitled thereto by the decision of the court in such action.
(4) Upon such application for a grant, any caveat entered by the plaintiff in the action, and any caveat in respect of which notice of the action has been given, shall cease to have effect.