Corporate Governance Governance and Sustainability System The corporate governance system of Scottish Power Energy Networks Holdings Limited is known as the Governance and Sustainability System. View more information on the Governance and Sustainability System. All of the policies and documents constituting the Governance and Sustainability System are divided into 5 ‘chapters’ ((I) By-Laws, (II) Purpose, (III) Environment and Climate Change, (IV) Social Commitment, and (V) Corporate Governance), each of which can be accessed in the links adjacent.