77.-(1) A minor who has attained the age of seven years if he is without a guardian competent to sue or defend may elect a guardian ad litem for the purpose of any proceeding on his or her behalf.
(2) A guardian for an infant under the age of seven years may be assigned by a Judge upon an ex parte application supported by affidavits.
(3) The election, the consent of the guardian to act, and an affidavit showing fitness and no contrary interest, must be filed in the registry before an elected guardian can be permitted to file a petition or enter an appearance on behalf of the minor.