Rule 15 Appointment of guardian ad litem

[^f1 not later than 21 days after service of the civil bill except with the consent of the other parties or the leave of the court], a guardian ad litem may be appointed by the chief clerk on application made to him on behalf of that defendant, on affidavit in Form 6 together with a written consent of the proposed guardian to act;

where the appointment is so made, the order shall be in Form 7 and the chief clerk shall send notice to the plaintiff in Form 8;

where a guardian ad litem has not been appointed under sub-paragraph (a) or where the person appointed dies or otherwise becomes unable or unwilling to act, [^f2 the judge or district judge as the case may be] may appoint, a person to be guardian ad litem.