Organic Law for the Bangsamoro Autonomous Region in Muslim Mindanao (Republic Act No. 11054).

The purpose of this Organic Law is to establish a political entity, provide for its basic structure of government in recognition of the justness and legitimacy of the cause of the Bangsamoro people and the aspirations of Muslim Filipinos and all indigenous cultural communities in the Bangsamoro Autonomous Region in Muslim Mindanao to secure their identity and posterity, allowing for meaningful self-governance within the framework of the Constitution and the national sovereignty as well as territorial integrity of the Republic of the Philippines. The executive function and authority shall be exercised by the Cabinet which shall be headed by a Chief Minister. The powers of Bangsamoro Government shall be vested in the Parliament which shall exercise those powers and functions expressly granted to it in this Organic Law, and those necessary for, or incidental to, the proper governance and development of the Bangsamoro Autonomous Region. The Chief Minister shall be elected by a majority vote of all the members of the Parliament. The constituent units of the Bangsamoro Autonomous Region are the provinces, cities, municipalities, barangays, and geographical areas within its territorial jurisdiction.
All inland waters such as lakes, rivers, river systems, and streams within its te rritorial jurisdiction shall form part of the Bangsamoro Autonomous Region inland waters. The preservation and management of the inland waters shall be under the Bangsamoro Government as provided form Section 22, Article XIII of this Organic Law.