First instance body dealing with electoral disputes

Constitution 2005, Article 105

The High Court shall have jurisdiction to hear and determine anyquestion whether –

(a) any person has been validly elected or appointed as a Memberof Parliament;

(b) any person has been validly elected as President, DeputyPresident, Speaker or Deputy Speaker; or

(c) Any person, having been validly elected as President, DeputyPresident, Speaker or Deputy Speaker, has validly vacated that office.

http://aceproject.org/regions-en/eisa/SZ/CONSTITUTION%20OF%20THE%20KINGDOM%20OF%20SWAZILAND%202005.pdf

Parliament (Petitions) Act, 2013. Art. 7

HOUSE OF ASSEMBLY

Avoidance of election or appointment ofcandidate on petition.

7.                         (1)                       The election orappointment of a candidate as a Member shall not be questioned except on apetition presented to the court requesting that the election or appointment bedeclared void.