KUALA LUMPUR, May 5 -- Over the past few weeks, Negeri Sembilan was rocked by an attempt by four traditional ruling chiefs ("Undangs") to remove the state ruler Tuanku Muhriz Tuanku Munawir.

But legal and constitutional experts have said that this attempted removal of Tuanku Muhriz is invalid, and that he is legally still the ruler of Negeri Sembilan.

Here are six things you need to know:

1. Firstly, who are the Undangs and what role do they play?

Based on the Adat Perpatih or custom practised in Negeri Sembilan, there are four Undangs or ruling chiefs for four traditional territories (Sungai Ujong, Rembau, Jelebu, Johol).

Under Negeri Sembilan's written State Constitution, the Undangs' roles include electing the Yang di-Pertuan Besa...