A delay in the Registrar of Societies’ (ROS) decision on whether to accept Umno’s amendments to its constitution will cause political instability, said think tank Centre for a Better Tomorrow (CenBet).

In a statement, CenBet president Gan Ping Sieu said without a simple “yes or no” answer from the ROS, Umno, a major political party, will not be able to decide on its next course of action judiciously.

“This adds fuel to the political instability that has...