These are voluntary norms, protocols, and consensus-based stakeholder processes that define good environmental, social, economic and institutional practices for a given industry. When applied, they inform stakeholders about the compliance of infrastructure projects with the Standard’s criteria. Yet, distinct from Rating Systems, they do not offer differentiation of compliance levels. Standards are issued by official national, regional or international standardization bodies and follow a strict periodic review process. Examples of international standardization bodies include the International Organization for Standardization (ISO).