Original: Johor was the first state in Malaysia to adopt the constitutional monarchy system via Undang-undang Tubuh Negeri Johor (Johor State Establishment Constitution) written by Sultan Abu Bakar.
Simplified: It was the first state in Malaysia which adopted the constitutional monarchy system, and its laws are stated in Undang-undang Tubuh Negeri Johor (Johor State Establishment Constitution), written by Sultan Abu Bakar.