A critical infrastructure partnership's organizational structure: A. Must have a Joint Investment Justification. B. Must be registered as a Section 501 (c) 3 entity. C. Can be either formal or informal. D. Is established by statute.

B. Must be registered as a Section 501

Explanation:

Critical infrastructure partnerships are ensures resilience and security of of a nation's critical infrastructure by multiple stakeholders. The government and private sector do not have all the knowledge, resources and authority to do this alone.

Pubilc-private partnerships are essential for maintaining that countrie's critical infrastructure security through information sharing among stakeholders. They are required to register as a Section 501